Prompt: One of the student's discover Koro-Sensei's ticklish spots on accident
It was Irina's fault.
Most things were but this took the cake.
It all happened on an ordinary school day. It was during English and Irina was walking into class. But just then, a flying octopus at Mach 20 speed crashed into her while trying to escape the shots from Chiba and Hayami's gun. They both ended up opening the door at the exact same time. But Koro-Sensei opened it too quick and Irina ended up flying into another body. She opened her eyes to see a….yellow tentacle? Koro-Sensei had flown back to intercept and stop Irina from breaking a bone .
"I'M SO SORRY IRINA-SENSEI! SENSEI DIDN'T MEAN TO HARM YOU! PLEASE DON'T LEAVE THIS CLASSROOM!" he wailed out.
Brushing aside his offer for assistance, Irina got on her hands and knees to pick herself up. But the floorboards weren't exactly the safest thing on the planet. As she rested her hand on her thigh, the board under her gave away. Out of sheer reflexes, Irina grabbed onto Koro-Sensei's foot. By now, students had heard the commotion and were out there trying to help when they all heard a laugh however, everyone paused.
"What was that?" Megu asked.
"It sounded like….." Isogai started
"Laughter," Maehara finished.
They all looked up at Koro-Sensei to see his face turn into a faint shade of pink. While Yada was helping Irina climb up and clean her dirty foot, a smirking Karma knelt down and wriggled his hands on the undersides of Koro-Sensei's foot-tentacle. Laughing quite different from the usual "Nurufufufufu," noise that the teacher made was heard as Koro-Sensei gripped his middle and began to bend over.
"AHAHA! Karma-kun, HAHA please, stop!" the octopus teacher begged. Nagisa quickly pulled out his notebook and began scribbling down another of Koro-Sensei's weakness.
"One of you, stab him and get it over with!" Kayano shouted. Karma paused slightly at that which gave Koro-Sensei enough time to run away from him and into the teachers room.
"What the hell was going on out there?" a slightly irritated Karasuma gritted out. Karasuma turned his head only to be met with silence. The octopus had left. The sound of footsteps alerted him about the students before the door even opened. When it did, Maehara slammed it open and asked for Koro-Sensei. "He left right now. Why do you need him? Shouldn't Irina be teaching you right now?" Karasuma answered slowly.
"We found out that Koro-Sensei's TICKLISH!" Kayano shouted almost bowling Maehara over. Raising his eyebrows in surprise, Karasuma smiled gently before telling them that although that piece of information may help them in future assassinations, the damn octopus would be on vigil alert.
"He also left. Probably because of this. So…GET BACK TO CLASS!" He yelled. The students were used to this type of yelling so they just shrugged their shoulders and went back to the classroom slightly disappointed that they couldn't assassinate Koro-Sensei.
Meanwhile, a crying Koro-Sensei was currently hiding incognito in the streets of Japan while eating pastries and wondering how he felt so ticklish on something he uses to WALK on.