Secret - Karma Akabane x Reader

Welcome Back, Itona

"Itona!" You all came out of your hiding spot.

Itona started attacking Professor Koro. You heard screaming, and the sheets were moving, which meant that Professor Koro was running into them, and he was getting hurt. 

"First we make drastic changes to the field. Then we attack. Easier to confine him first, then strike. I've taken a page from your tactics, you see." Shiro then turned his head to look at you guys. 

"Shiro! So you were behind all this?" Terasaka shouted at him.

"Exactly. Once that creature starts losing his students' trust, his movements grow panicked. Even if things seem a little off somehow, he'll dive right in, the fool."

"Dammit! That's our kill!" Terasaka scoffed.

"Why do you always play so dirty?" Fuwa questioned. 

"It's called 'being an adult.' What Itona has on his tentacles there are gloves with sharp edges made of anti-Professor materials. Every time their tentacles touch, the creature's bare tentacles will continue to take damage. Seems that's not enough to finish him off, though."

"Playing dirty doesn't mean you're an adult, you're still pathetic, relying on others to do the work for you!" You scolded him, but that only made him chuckle.

"How cute. You'll understand once you're older." He said.

Professor Koro was thrown into the air, and trapped by Itona's tentacles.

"I won, big brother. By killing you, I'm solving just one problem: I'm proving... my strength!" He dropped him back down and starting attacking him from above again, but you heard Professor Koro chuckle.

"Yes, very well done, Itona! If this were before the first term, you may very well have killed me. But your attack pattern is a simple one." Professor Koro said. "No matter how fast you are, no matter how strong, no matter how easily I freak out, by our third fight, I can see and adapt to your patterns." 

"No way... It can't be!" Itona was furious. He wanted to be the strongest and the best.

 "Itona... I study, too, you know. How could I teach anyone if I didn't grow and learn day by day?" Professor Koro said. "Now, let's get rid of this dangerous cloth cage. Experiencing my Absolute Defense Form over summer vacation taught me yet another skill: compressing not my whole body, but a portion of my tentacles to release a burst of energy."

A huge light was coming from inside the cage Professor Koro was in, and it kinda hurt your eyes.

"Wh-What..?" Shiro said.

"Remember this, Itona. I say assassination is education. The assassination classroom's teacher will get stronger every time he teaches!"

Then the cage that Professor Koro was in burst, and the light became even stronger

"So there you have it, Shiro." Itona was in Professor Koro's arms, unconscious. "Leave him to the E Class and go quietly. Oh, and... Spread the accurate word that I am not an underwear thief!

"And I'm actually a B-cup! A B-cup!" Kayano yelled at Shiro, since he basically called her "Forever Flat."

Then suddenly, Itona woke up puking. He was on the ground, groaning in pain.

"It hurts..!"

"Itona!"

"My head's... Killing me! My brain's about to burst!" He grabbed onto his head in agony, and you kinda felt bad for what was happening to him.

"With the shock of his repeated defeats, his tentacles are starting to gnaw away at his mind..."

"Hang in there, Itona!" Professor Koro tried to calm him down, but it wasn't working.