I looked at Koro-sensei with pure eyes of disgust. Bra thief? Really? He was THAT perverted?! I didn't think we was like that...
"Honestly. I'm disappointed, Koro-sensei."
"How could you do this?"
"Hold on, you guys! We can't just accuse him like that! Sure, he sometimes has his little world desires. But, if you think of all the things he's done until now, the worst he's done is picking up and reading porno magazines and being bribed with photos of girls in swimsuits and staring at gravure magazines during break like he lost it and... 'hand bras just won't do, let me give you a tentacle bra' he'll write out as requests on postcards and..." Yep, Isogai's now on our side.
"I'm innocent! Look, Sensei will show you the contents of his desk!" He opened his desk, pulling out a bra immediately.
"Hey, guys! Look at the roll class book!" Yada screamed while running towards us. I looked down, seeing a (breast size) next to my name... Wut.
"I know! Let's all have a barbecue!" He opened a box and revealed bras on sticks. It's a bit weird, actually. Koro-sensei's usually quite smart, leaving all of this in places where we could find them, and then leading us towards them. This is very out of character.
The first lesson then began, Koro-sensei was very tense throughout the whole thing. Now I'm certain about it, he didn't do this. He was framed. I wonder what he was framed for, though.
"At any rate, if these rumours spread out and our bounty couldn't stay in town anymore,  we have nothing to gain. Why don't we beat the hell out of the culprit and have Koro-sensei owe us one?" I heard Karma say. Shit, they stole my plan...
I walk into the teacher's office, seeing Koro-sensei with his face in his hands. "Oi, octopus." I tried to get his attention but he ignored me. "Dude, I'm trying to help you. It clearly wasn't you. A girl idol group with massive tits is supposedly nearby. If the culprit's going to be anywhere tonight, it's there. I'll help you, but you'll owe me one." he looked up at me with his usual creepy smile and nodded.

Late at night~

I sat next to the massive man in the bushes, wearing my old assassin's gear. I miss it if I'm perfectly honest, and it's really comfy. I looked next to me, seeing him wearing some stupid bloody veil and shades, making me roll my eyes. I looked to the other side to see Karma, Nagisa, Fuwa, Kaede and Terasaka hiding behind another set of bushes. A man then came over the large wall, wearing a... Yellow helmet. I fucking knew it.
"Go get him, octopus." I whispered to Koro-sensei, smirking. He was about to grab one of the bras when Koro-sensei tackled him. He pulled off the helmet and revealed...
Karasuma-sensei's subordinate?!?!
"Why are you doing this?" and with Koro-sensei's question, sheets fell down and caged him. Wut...
"I had him lure you into this cage of anti-sensei sheets." I heard Shiro say. Shit. Itona jumped into the cage. What do I do?!?! I can't see what's happening inside, I can only hear, and it doesn't sound good. Then I heard Koro-sensei talking.
"Your attack pattern is simple. No matter how fast, no matter how powerful, no matter how many strategies your guardian comes up with, no matter how temperamental Sensei may be. By the third time, I can adapt to and see through you."
An adaptation to him that quickly?!?! I've only ever known 2 people who have managed that. Me, and my brother... Hmmmmmmm. There was suddenly a massive burst of light coming from inside the tent. Are they okay?!?! What happened?! Koro-sensei put down Itona and told Shiro to back away. Itona then put his hands on his head, screaming in agony. I quickly tried to run to his aid, but Koro-sensei kept me back with a tentacle.
"So this is the boy's limit, it seems he can't even carry out my strategies of this level." I looked at Shiro in shock, how could he say such a thing?! Does he not care about Itona at all?! "This is goodbye, Itona. You're on your own now." Shiro said, walking off. Itona's head then snapped up. He looked crazy. I need to help him, he needs to gain control. I run over to him.
"Itona, please. Calm down. I can try to help you." I tried to reason, but his head snapped towards me and he lashed out with his tentacles. I was about to take a hit to the stomach, but Koro-sensei blocked it with his tentacle. "Koro-sensei, can you take me home? I'm not exactly in the mood to walk." I looked up at the octopus-like creature and raised an eyebrow. He nodded and grabbed me, shooting off towards my apartment. When I got home, I thanked him and immediately went to do some research. Horibe. I recognise that name. I open up my laptop and type it in google, news articles about phone stores showing up. Horibe was a cell phone company that got overpowered by other companies and run out of business. Okay, I think I know where he'll be. I put 2 throwing knives in a strap on my stomach, just in case, and head towards the nearest cell phone store. Just as I expected, it's completely trashed. I see Itona hunched over and holding his head.
"Okay, Itona. It's me, (y/n). I'm not going to hurt you, I'm here to help." I soothed him, taking small steps forward. He looked up at me and hissed slightly.
"What are you." he asked, although it was said more like a statement. I only looked at him in curiosity. "You're not who you say you are." Okay, what the hell do I say to that?
"I'm someone you can trust, and that's all you need to know." I replied, hoping he wouldn't push it further. He got up, his face still slightly pained, and walked towards me. He stopped right in front of me, being about a head taller. He lifted my chin up with his index finger and caressed my cheek with his thumb. I started to blush furiously, not used to this kind of affection. He just stood there, staring into my eyes deeply until we heard police sirens in the distance. He grabbed my hand and pulled me away from the store quickly. We were soon far away from the store and he stopped on top of a large house. He leaned down, his eyes still boring into mine and... Kissed me. Like, it's not a bad kiss, but I'm technically with Karma... I think? He suddenly pulled away, still leaving me in my own thoughts.
"I hope you find your brother." he said before sprinting off. What?! How does he know?
I use free running to get home via roof tops and collapse on my couch. Why was he staring into my eyes for that long? Noone's ever done anything like that before. I'd be lying if I said it wasn't comforting. And what was that kiss? It wasn't the same as with Karma, but it definitely wasn't a bad kiss. I honestly don't know how to feel about it...
I skip the next day of school, deciding to go and find Itona again. I go to the next cell phone shop I think he'll visit and see this one trashed as well. I sit down at the entrance of the shop and smile at him. He needs to let all of his rage and anger out, and I will try my best to help him get over this. That's what classmates do, is it not?
"Finally, I get to see a human-like face. Itona-kun." I hear from behind me, turning around to see Koro-sensei with all of class E behind him. Itona gradually got more and more angry, threatening to fight Koro-sensei. "Of course, when a teacher is met with a student, it is their instinct to teach them." our homeroom teacher continued. For a split second, I saw Itona's face relax... And then the shop blew up. The smoke eventually cleared and I saw Itona being dragged away in a net by a car. Koro-sensei checked to see if everyone was okay before going straight after them.
"(y/n)... What are you wearing?" I looked over at the Isogai after he asked the question. Shit, I completely forgot I'm in my assassin gear.
"Ummmm... I dressed like this for Halloween last year and just liked it." I'm fairly sure it was obvious that I was lying, but it's the best I could come up with. We all headed in the direction of where Itona was taken, coming across multiple bullets being shot at Koro-sensei who was trying to help Itona out of the net. Karma and Maehara climbed up 2 trees, kicking away the men on them. We then started taking down each guy one by one, leaving just Shiro and a few others.  We freed Itona next, Shiro then fleeing in the truck.

See, Itona-kun. This is what classmates do for each other.