I Came to Protect Them But Now I Only Corrupt Them (R-21)

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"Alright, it's about time we headed to the movie theater," Katagiri's voice made the sisters stiffen.

"We..." Anri stammered, "We have to go home now..." A thin sheen of sweat appeared on her forehead. Kokoro, next to her, also looked pale. Both of them were exhausted.

"It's alright. It's still early," Katagiri stood up and offered both hands. "Here."

Anri and Kokoro stared at his hands. They knew there was no option to refuse. With trembling hands, they took Katagiri's outstretched hands.

"That's good," Katagiri smiled broadly and gripped their hands tightly. "I'll walk in the middle."

Thus, the three began to walk with Katagiri in the middle.

"Big sister... haa haa," Kokoro's voice trembled.

"Ugh... Kokoro..." Anri looked at her sister but couldn't even encourage her.

The walk to the station. A distance that usually took less than 10 minutes now felt like an eternity. Katagiri continued to talk cheerfully, but his words didn't reach their ears. Each of them desperately tried to think of a way to escape this situation.

"Oh, the train's coming," When they reached the station platform, Katagiri pointed ahead. A crowded train slowly glided into the platform. Many passengers disembarked from the open doors. Anri gripped her sister's hand tightly, trying to distance herself from Katagiri as much as possible.

"Oh, good," Katagiri exclaimed, "There are seats available."

Indeed, after the disembarking passengers, two empty seats could be seen. However, that sight didn't seem like salvation to the sisters. Katagiri quickly secured the two conveniently empty seats.

"Anri, over here," Katagiri pointed to the window seat.

"What about Kokoro?" Anri looked at her sister worriedly.

"Here, come here," Katagiri lightly patted his lap. "You're small, so sit down."

"I'm not a child anymore..." Kokoro's face turned red.

"You're still a child," Katagiri fiddled with his backpack on his lap. There was a strange resonance in Katagiri's voice. "Don't mind it." He half-forcefully removed his backpack and quickly seated Kokoro on his lap.

'Zuchuuuuuuu' Kokoro's short-length dress rode up on Katagiri's lap. Katagiri's erect penis inserted into Kokoro's ass. Kokoro's expression twisted for a moment.

"Fuguuuuuuuu"

"Oh, right, Anri. About the next match..." Katagiri began talking about karate. Anri nodded vaguely, her eyes somewhat vacant.

The swaying train car.

'Gatan Gotton' 'Jupojupopu'

"Nguuuunnnnnn" Each time the train swayed, Katagiri's penis, inserted in Kokoro's anus, moved slightly in and out. Kokoro, on his lap, shifted restlessly. She seemed to be desperately trying to suppress the urge to escape. The scenery flowing outside the train window receded further and further, like their fading freedom.

"You're nervous," Katagiri's voice echoed in Kokoro's ear. "I'll give you a shoulder rub."

"No, stop... Nguuutt," Kokoro's voice trembled. Her cheeks flushed even redder. In the swaying train car, Katagiri's hand rested on Kokoro's shoulder. Her cheeks reflected in the train window were bright red. Katagiri's hand began to move. Kokoro's small body tensed slightly. It was clear she was desperately trying to suppress the urge to escape. In sync with the train's movement, Kokoro's body moved further up and down by Katagiri's hand. As the stroke deepened, further stimulation assaulted Kokoro.

'Gatangatangottongotton' 'Zuchuzzuchubachunbachun'

"You need to relax."

"Uah... no... I don't want to! Ahhh!" There was a hint of malice in Katagiri's voice. "You're still a child, so it's okay to just be spoiled."

"No... oh... I'm getting weird..." Anri watched this out of the corner of her eye, muttering in a small voice, "Kokoro... I'm sorry... I can't stop him forcefully in front of other passengers... it would draw attention..."

The hand on her shoulder still didn't stop. Kokoro's breathing gradually became ragged.

"Ahhh... nn... in a place like this... me..."

"Please, stop it now!" Anri finally raised her voice. Her voice was filled with desperation. Katagiri's right hand hovered in the air for a moment. Seizing that moment, Anri instinctively took his hand.

"Shall we continue our conversation?" Anri tried to steer the topic back to karate. "About the match earlier..."

Katagiri considered for a moment, then gripped Anri's hand back. "That's right. It was about that technique."

Kokoro thanked her sister in a small voice. "Big sister... thank... you... unnnnnn" Even so, his left hand remained on Kokoro's shoulder. Unable to completely stop the situation, the sisters felt an unspeakable frustration.

The train continued to run through the cold spring rain. Unnoticed by anyone, the sisters' small resistance and unceasing tension continued.

"No... false... feeling good... why..." Kokoro's small voice leaked out. Her face bright red, she desperately endured. Katagiri's smile deepened. Anri watched her sister worriedly, gripping Katagiri's hand tightly. But it couldn't change the situation.

"Why... why is this happening... You're a pervert... I..." Kokoro's body twitched, drooling. The surrounding passengers also began to notice such abnormalities.

"Miss, are you alright?" An elderly woman asked worriedly. "Are you feeling unwell?"

"No... no..." Kokoro replied with a trembling voice, "It's just... sitting on his lap... like a child... I was a little... embarrassed... that's all..." She forced a smile. "We'll get off at the next station... I'm fine. My sister is fine." Anri quickly spoke to the woman to smooth things over. "Don't worry."

Katagiri finally stopped rubbing her shoulder. But next, he started shaking his knee restlessly. The train was approaching the next station. But even that short time felt like an eternity to the sisters. No one knew, no one noticed what was happening on the train. But Kokoro's body was definitely changing. The sensation of the penis inserted into her anus stimulated Kokoro's nerves.

"Ah... ah..." 'Gatagatagata' 'Jubojubojubo' "Nnnnnn... no... it's coming..." "No..." The restless leg shaking intensified. Anri's hand, unable to bear Kokoro's state, reached for Katagiri's knee. Katagiri's sharp gaze caught Anri. The ability to paralyze. Anri's hand froze in mid-air. Kokoro, on his lap, desperately endured the intensifying vibrations. But she couldn't escape.

"Next station approaching," The train announcement echoed.

"Ahhh~... nnnn... no no no..." Kokoro couldn't help but let out gasps. Anri squeezed Kokoro's hand tightly.

"Kokoro..." she whispered. Kokoro closed her eyes and shook her head. "It's okay..." Kokoro forced the words out. Anri was surprised by the scene before her but desperately tried to avert her eyes from reality.

"Big sister... don't look... nnnn" Kokoro pleaded with a trembling voice.

"I'm sorry, but I'm worried too..." Anri said this, but couldn't look away. Her own sister was accepting a penis in her ass. It was an unbelievable sight.

"Nnn, fuuu... I can't... hold it..." Kokoro let out uncontrollable moans. The intense pleasure she felt for the first time made her mind go blank. Something hot overflowing from her core was taking away Kokoro's ability to think.

"Auh... hiccup... me... everyone's watching..." Each time a sound leaked out, the surrounding passengers' gazes gathered. The surrounding passengers looked puzzled but pretended not to notice.

"No... not here... I'm the worst..." Kokoro desperately resisted, but her intestinal wall surely wriggled and trembled with the in and out movement of the penis. Katagiri smiled and thrust deeper.

"Big sister!... Don't look!" Kokoro cried out in a small voice towards Anri. Her cheeks were bright red, and tears welled up in her eyes.

"I'm sorry... but..." Anri could only continue to stare at Kokoro without saying anything.

"Ah... no... I'm..." Finally, Kokoro's true feelings were about to leak out. At that moment, Katagiri's piston movement accelerated.

"No... no more... I'm going to... Ahhh!" Kokoro's body twitched. Then her eyes rolled back, her legs straightened, and her body convulsed violently. At the same time, she felt the sensation of a penis expanding inside her buttocks. A large amount of semen was released into her intestines.

'Byurrr byururururuuuu' 'Bushubushuuuuuu'

At that moment, Katagiri's body also began to tremble. Two bodies convulsing. Anri could do nothing. Only look away.

The train stopped. The doors opened.

"K-Kokoro..." Anri embraced her sister to support her. "I'm sorry, Big sister... I couldn't hold back... I came from anal sex... I'm a pervert... I am... Everyone saw me... But... it felt good... I'm thinking that... I hate it... My body and mind... I can't control it..." Kokoro apologized breathlessly. Anri gently stroked her head, comforting Kokoro. "It's alright, Kokoro. Don't worry about it now."

With tottering steps, they moved onto the platform. Katagiri, with a meaningful smile, hid his lower abdomen with his backpack and disembarked, leaning close to Anri's body. The cold spring wind swept across the platform. It seemed to drown out the sisters' silent cries.

Led by Katagiri, Anri and Kokoro headed to the multi-purpose restroom. Once inside, Katagiri locked the door.

"Ah...!" "Oh no... what if someone comes...?" Anri and Kokoro were scared. But Katagiri was still grinning.

"Don't worry. The door's locked."

"Really?" Kokoro's expression was uneasy. Seeing this, Katagiri's smile deepened. "Yes, believe me. It's alright."

"Okay... I understand," Kokoro sighed in relief.

"Well, then, shall we begin?"

"Eh? What are we doing?" Anri was surprised by his sudden words.

"What do you think? Anal sex. You've already got your switch flipped, haven't you?"

"Ah... no..."

"Heh heh, you're cute. You want to feel even more intensely good, don't you?" Katagiri pulled out his penis. It was already hardened. "You two are mine. I'll do whatever I want to you."

"No!... I'm scared of changing anymore..." Kokoro cried out tearfully.

"Don't worry. It's good to change into a meat toy and a sex slave. I'll make you feel so good you'll die." Katagiri inserted his finger into Kokoro's ass. He slowly inserted it and moved it to loosen her up inside.

"Ah... hiiiinnn..." Kokoro's face twisted in pain. Seeing this, Anri looked uneasy. "It's alright. Kokoro has a sensitive body. You climaxed on the train, so you're a proper pervert."

"Per... vert..." Katagiri smirked and continued to speak to the bewildered Kokoro. "Anri, you try anal sex too. I'll make you feel good."

"Me too?" Anri looked surprised.

"That's right. You saw Kokoro getting it, and you couldn't really hold back, could you? You want to be relieved quickly, don't you?"

"Th-that's..." Anri stammered. But she succumbed to Katagiri's pressure and finally confessed. "Yes... I really can't hold back... I want it in too... penis... please..."

"Well said. Then, after Kokoro, I'll defile your ass. Kokoro, beg for it. If you don't beg well, that defecation video from earlier might get spread..."

"Stop it! I'll say it, just stop! Don't you dare release that video!"

"Alright, alright. Just kidding. Hurry up."

"Nnn... give it to me! Defile my ass!... Hurry... please..." Kokoro pleaded earnestly with Katagiri. Her ass twitched, eagerly awaiting the penis.

"Heh heh, don't rush me. I'll shove my penis all the way in, so look forward to it. Scream obscenely like crazy. If you resist or make me lose my temper, I'll spread the video." Katagiri grinned and stripped off his pants and underwear. His penis was already rock hard, and clear pre-cum began to drip from the tip.

"Ah... Katagiri-san's penis... it's big..." Kokoro gasped in surprise at the huge dick that appeared before her. Its length and thickness were perfect.

"Don't be scared. I'm going to thrust harder than before. I'll make you feel so good with my penis you'll die." Katagiri gently stroked Kokoro's back and slowly brought his penis closer to her ass.

'Zuchuuuuuuu'

"Ah... it's coming in..." The penis slid smoothly back into Kokoro's anus. The insertion angle caused it to scrape against her intestinal wall as it penetrated, resulting in unexpected pleasure that made Kokoro's body twitch.

"Annn... it's all the way in!... A thick penis feels so good!... Nnnn!" Kokoro's face was in ecstasy, intoxicated by a pleasure that seemed to pierce her brain. It had been a day of enduring threats, humiliation, and shame. But here, her mental barriers suddenly broke down. She simply surrendered to the pleasure that pierced from her anus to her brain. Kokoro herself began to thrust her hips against Katagiri's waist, seeking further pleasure. Seeing Kokoro like this, Katagiri increased his speed further.

'Pann! Pann! Pann! Pann! Pann! Pann!' Katagiri's hand, firmly gripping Kokoro's waist, slammed her small buttocks against his hips.

"Hyaaan!... Fast!... So intense!" Each time she was intensely thrust from behind, Kokoro's butt flesh jiggled. Katagiri's penis violently pierced her anus, and Kokoro's body was dominated by pleasure.

"Auh!... Auh!... Aaaaaaah!" Kokoro screamed with the violent piston movement. Her intestinal wall was strongly stimulated, feeling like her internal organs might burst out.

"Does it feel good? Doesn't it feel good?"

"Yes!... It feels good!... But... I'm scared!... I'm going to get weird!... Feeling this much in my butt hole... it's definitely weird!... I'm getting weird!... My body is changing!..."

"It's alright, come on! If it feels good, just surrender to the pleasure!" Katagiri thrust his hips with even more force.

'Bachuu! Bachuu! Bachuu! Bachuu! Bachuu! Bachuu! Bachuu! Bachuu!' His penis thrashed inside her anus, and Kokoro felt like her mind was going crazy from pleasure and fear.

"Ahhh!... Ahhh!... I'm going crazy!... I'm going crazy! No no no it feels too good! I'm coming!... I'm coming!..."

"Don't hold back, just come hard!"

"Hyaau!... Aaaaaah!... I'm coming!... I'm coming! I'm coooooming!"

'Bushuu! Bushuuuu!' Kokoro convulsed and thrust her hips, spurting large amounts of fluid from her pussy as she climaxed. Katagiri continued his violent piston movements, seemingly enjoying it.

'Pann! Bachuu! Dochu! Pann! Bachuu! Dochu! Pann! Bachuu! Dochu!'

"Stop it!... I'm coming!... I can't take it anymore! It feels so good!! I can't stop coming! I can't stop coming! I'm going to die from coming in my ass!... Nnnnnghhhhhh!"

'Bushuu! Bushuu! Bushaaaa!'

"What are you saying?! It's just getting started!!"

'Dochu! Dochu! Dochu! Dochu! Dochu! Dochu!'

"Ah!... I'm coming!... I'm continuously coming!" Kokoro reached for the handrail in the toilet and desperately clung to it. She struggled with conflicting feelings of not wanting to come and wanting to come more.

"Come! Come! Cum more and more! Kokoro!"

'Dochuuu!' Katagiri screamed and thrust his penis deep inside her. At that moment, Kokoro's body arched violently, reaching an intense climax.

"Aaaaaah!... Nnnngh!... Nnnn! I'm coming!... I'm coming! I'm coming! I'm coming! I'm coming!" Love fluid spurted from her pussy like a fountain, scattering around. Kokoro nearly lost consciousness from the pleasure that pierced her brain. Katagiri firmly gripped Kokoro's convulsing waist and continued to thrust his hips, pushing Kokoro further.

'Pann! Bachuu! Dochu! Pann! Bachuu! Dochu! Pann! Bachuu! Dochu!'

"Nnnngh! Ahh! Noooo! It feels so goooood! It feels so goooood! It feels so goooood! Nnnnghhhhh!"

'Bushuu! Bushuuuu! Bushuu! Bushaaaa!'

Kokoro, eyes rolled back and her head and hips twitching violently in climax, exceeded her limit and collapsed onto the toilet floor, losing consciousness. A large amount of Katagiri's semen dripped thickly from her wide-open ass.

"Well, now it's Anri's turn. You can beg for it, can't you?" Katagiri smirked and approached Anri. Anri looked down shyly, but then raised her face as if she had made up her mind.

"Please... put your penis in my ass too." Anri spoke in a small voice. Katagiri smiled gently and took Anri's hand. "It's alright. I'll make you feel even more intensely good than Kokoro, so much so you'll die." Anri nodded and stripped off her dress.

"Spread your ass yourself and beg more obscenely." Anri was in a posture that exposed her anus to Katagiri. "Come on, hurry up."

"Then... Please put your penis in my ass." Anri said, looking at Katagiri and pleading. Katagiri grinned and brought his ready penis closer to Anri's anus. Anri spread her anus wider with both hands. Her anus twitched, and the opening widened.

"Hurry, put your penis in... I want to climax in my ass..." Katagiri stood before the pleading Anri. His penis was already fully erect, and clear drops were dripping from the tip. Katagiri rubbed the tip of his penis against Anri's anus. Anri's anus twitched, as if eagerly awaiting to be penetrated. Love fluid was also dripping from her pussy.

"Please... hurry... put it in... please... Ah... insert it... I want you to put your penis in my ass..."

"Don't be so impatient. You got excited watching your sister go crazy, didn't you? You pervert!"

"Use more vulgar words. Show your true nature." Katagiri smacked Anri's back hard. Anri's body jumped violently from the impact.

"Auh!... I'm sorry!... Do I have to use more... more terrible words?" Anri desperately racked her brain, searching for words she never thought she'd say. "Penis... please put your penis in... thrust your penis into my pooping hole... thrust your penis into my ass roughly! Please cum a lot... please!... Please make me climax again and again until my ass breaks!" The words that burst from Anri's mouth were far more vulgar than anything imaginable from her usual self.

"More! Expose yourself even more!"

"I'm a perverted woman who loves anal sex! Please put your penis in the ass of such a perverted woman like me! I want your penis shoved into my anus! Even when I masturbate every day, I dig my anus with my finger and masturbate alone...! Please mess up my dirty ass with Katagiri's thick glans!"

"Seriously?! You're seriously a pervert, aren't you?! You masturbate a lot with your ass?! If the students at the dojo found out that Anri-ojousama is an anal addict, they'd faint!"

'Zubuuuzubububububuuuuu' As Katagiri slowly began to insert his penis, Anri held her breath but desperately made a sound.

"Hiiih!... It's here! The penis is coming into my ass! Oh my god... this is insane! It feels too good! It's going all the way in! It feels so good... please thrust quickly... please pump your hips..." Anri pleaded with Katagiri, longing for it. Katagiri grinned and began to thrust his hips violently.

'Pann! Pann! Pann! Pann! Pann! Pann!'

"Aaaaah! Amazing! It's reaching deep inside! It's coming in so deep! It feels too good! Hiiih!... Your penis is too big!... The in and out... is too intense!" Anri's face twisted in pain, yet she was intoxicated by pleasure. Katagiri took Anri's buttocks in both hands and began an even more violent piston movement, slamming into her.

'Bachun! Bachun! Bachun! Bachun! Bachun! Bachun!'

"Aaaaah! It feels so good I'm going to die! Aghuuuuh! The penis is all the way in! My ass feels so good I'm going crazy!" Anri also thrust her hips herself, seeking pleasure.

"Your parents would be surprised if they knew. Their proud daughter, whom they carefully raised, who won the national karate tournament. You, who had a brilliant career and were devoted to karate, are now addicted to anal sex and thrusting your hips yourself."

"Shut up... I like karate too... Ah! Oh no! This is bad! It's not stopping! I've fallen in love with anal sex too... Ahh, it's intense... My ass is being gouged by a deep and large penis... Ahh, it feels so good! Ah!... Ah!... I'm coming!... Ah!... Ah!... Ah!... I'm coming, I'm coming, I'm coming!" Katagiri accelerated his piston movement, grinding against Anri's intestinal wall.

'Bachuu! Bachuu! Bachuu! Bachuu! Bachuu! Bachuu! Bachuu! Bachuu! Zuboo! Zuboo! Bakonbakon!'

"Ah! Ah! Hiiih! My insides feel like they're going to burst! Ahin! Ahin! My ass is being thrust and my mind is going blank! Ah! Ah! Ah! I'm coming! I'm coming again! I'm having continuous orgasms in my ass! Aaaahn! I'm coming! I'm coming! Hyaaaaaaaaaaaaaaaa... It's here! Aaaaaaaaaaaaaaaa!" Anri screamed and her body trembled violently. Anri, having climaxed, became even more vulgar and pleaded with Katagiri.

"Please!... Thrust harder!... Shove your penis deep into my ass-pussy...! Make me cum!... I want my ass to be filled with your penis all the time!... Put your penis in my dirty ass and thrust it violently! Make me scream obscenely! I'll become a perverted woman, so please shove your penis into this dirty ass of mine!" Katagiri, in response to her words, gradually resumed his piston movement.

"Aaaaaaaaaaaaaaaa!... It feels so goooooooooood!... It feels so good I'm going to dieeeeeeeeeeeee!... Hyaaaaaaaaaaaaaaaa!... Your penis in my ass!... It feels too good!... My intestinal wall is going to be scraped away!... I'm going to die!... I'm going to dieeeeeeeeeee!"

'Bushaaaaa! Bushuuu! Uuuu! Bushuu!' Drooling and her hips twitching violently, continuous spurts of fluid erupted from her pussy. Anri continued to climax repeatedly, engulfed in a pleasure that felt like death.

"You're truly a vulgar woman, getting so out of control in your ass... I love you for that," Katagiri continued to thrust into Anri's anus with a twisted smile.

"Ah, ah... don't stop! Assault my ass even more violently! Ah, it feels too good! Ah, I'm coming! I'm coming! Ahhhhhhh! I'm coming!... I'm coming!... I can't take it anymoreeeeee!" Anri's body convulsed violently, and continuous white fluid spurted from her anus. Anri looked up at Katagiri with eyes dominated by pleasure. Her cheeks were bright red, and the drool dripping from her mouth splattered with each piston movement.

"Aaaaaaaaaaaaaaaa!... I'm coming!... I'm coming!... I can't take it anymoreeeeeee! Penis!... Your penis feels too gooddddddddd!" Katagiri's penis moved violently, penetrating Anri's anus. Each time, her body arched, reaching climax.

"Aaaaaaaaaaaaaaaah! It feels so good!... It feels so good to have my ass violently thrust by a penis!" Katagiri continued to thrust into Anri's anus with a twisted smile. Her anus was already a mess, and it was gradually preparing to receive semen.

"Hurry... hurry and pour your semen in!... Into my ass... release your semen!... Ah... ah!... I'm coming... I'm coming again!" As Anri demanded, Katagiri thrust his penis deep into her anus and released a large amount of semen from its tip.

"Hyaaaaaaaaaaaaaaaah! Hot!... Hot semen into my ass!... Ah!... Ah!... It's gushing out!..." Katagiri's ejaculation knew no end, pouring a large amount of semen into Anri's intestines. A milky white liquid overflowed from her anus and fell onto the floor.

"Aaaaaaaaaaaaaaaah! I can't take it anymoreeeeeee!... My mind is going blank!... I'm going to die... I'm going to dieeeeee!" Anri cried and trembled violently as she reached climax. Her consciousness gradually faded, and finally, she stopped moving entirely. Katagiri smiled contentedly, stood up from under Anri, and pulled up his pants and underwear.

"Phew, that was refreshing... What a view. The movie can wait for another time. Clean up the rest. I'll pamper you tomorrow and the day after too, see ya." With that, Katagiri left the multi-purpose restroom first.

With their asses wide open, dripping semen, the two beautiful girls lay collapsed on the dirty floor of the restroom, covered in love fluid and semen. Anri lifted her face, messy with tears and snot.

"My life is over... It's a living hell. I don't care about anything anymore..." Anri muttered weakly.

"Sorry to keep you waiting," Kiyomi-san's voice made me hastily remove my hand from my smartphone.

"Is something wrong?"

"No..." My hand trembled slightly as I took the tea.

"I'm worried about those two," Kiyomi-san looked at the garden with distant eyes. "They suddenly stopped going to school and the dojo..."

"..."

"Does Satou-kun know anything?" My words caught in my throat at the question. The images I had seen flickered in my mind. "If there's anything I can do..."

Just then, I heard a sound from the second floor. Surely, they knew of my visit.

"Surely... they'll be alright." I quietly stood up. "I'll come again." I felt Kiyomi-san's worried gaze on my back as I headed for the entrance.

Stepping outside, the spring wind brushed my cheek. I felt a faint presence at the second-floor window.

"Definitely..." I muttered as I started walking. I had to rescue them from this situation. Images from my memory raced through my mind one after another. Katagiri's smartphone, he must have even worse photos and videos. He's threatening them with those. I tried to analyze it calmly.

First, my physique. 195 cm, 120 kg. As proven in the fight with Yuji Yamaoka, this monstrous strength is real. In terms of raw strength, I can definitely overpower Katagiri. But... The feeling etched into my body from a week of special training at Tachibana Dojo. Karate skill cannot be measured by physique alone. Katagiri was the prefectural tournament runner-up. His skill is beyond mine. One moment of weakness and he could take me down with a technique. Like in the practice match... I know that. Katagiri in his karate gi rose in my mind. Supple movements. Sharp kicks. Precise punches. Everything was at a professional level.

Still... I clenched my fist tightly. This monstrous strength was sometimes like a curse. I was always afraid of hurting people. But not anymore. This strength is the only weapon to save the Tachibana sisters. Even if my karate skills are inferior, if I can just grab him once. Destroy his smartphone. That's all I need.

The images from my memory resurfaced again. The two of them at the karaoke box. The two of them walking in unfamiliar dresses. Inside the playground equipment. In the multi-purpose restroom. The two of them, so changed, unimaginable from their karate-practicing selves. And above all, the deep sadness in their eyes.

Absolutely... Inside my chest, anger transformed into determination. I will definitely stop him. The dignified figures of the sisters I once saw at the dojo. What can I do now to get them back? I can't win in combat. My techniques are inferior. Still, I have this physique and monstrous strength as weapons. And most importantly, he's not wary of my existence. Only one chance. I have to seize it.

Kiyomi-san is looking at me worriedly. She must have noticed her daughters' abnormalities. But she doesn't know the cause.

Leave it to me. I quietly swore in my heart. I will definitely bring them back.

It wasn't just a determination born of anger. It was an inevitable resolve, a mix of calm analysis and intense emotion.