The Assassination Classroom is real?! (Various x reader)

Final battle part 1

My stomach was doing flip after flip as I watch the class interact with sensei, it was getting closer and closer until I will be face to face with that lowlife fat bastard. Sensei was watching himself on the screen fully embarrassed since he was sure that bribing Okajima would prevent him from showing any embarrassing videos of himself.

of course there was no way he was going to miss that opportunity. Within the hour of them watching the video I snuck out and changed into a bathing suit so I can fulfil my part of the plan. 

I was too go under water and wait for the signal, there was a few of us already waiting; and I was making sure their breathing mask was working and they werent getting to uncomfortable.

I had a small role in this entire thing since I felt I don't deserve to be apart of it...this is somethin they all have to accomplish for themselves as individuals and as a whole.

-3rd POV-

The octopus laid on the couch with the life sucked out of him. Seeing an whole hour worth of clips of him doing the unthinkable was embarrassing enough; not only did the students capture secrete moments; they just had to share it with everyone! His reputation as a teacher is now ruined...he accepted his fate

Without the creature knowing the hut filled itself with water, catching the teacher off guard he started to question how the water was able to fill up this quickly.

"I didn't hear anyone pour water?!" He nervously looked at his feet as they were swelled up "Wait a minute! Don't tell me.."

"That's right! High tide!" One of the male students praised

In front of Koro-sensei stood the 7 student that were promised a tentacle each for passing their exam with the top scores. All guns aimed at the teacher.

"Now for the main event! A promise is a promise! No dodging now!" Terasaka exclaimed

Sensei became nervous since he knew that once the minute of him not moving was enough for them to hit their target. Although he knew he couldn't escape those in front of him he figured those who aren't their are going to be backup. Meaning he figured out exactly where the best snipers in the class was hiding.

On the water five students where in boats ready for Ritsu to give the signal. {Y/n} stood with Karma on one of the boats holding out her phone.

Ritsu was on the screen, "Commence Operation!" With that the clock started ticking the 1 minutes they had to defeat this creature.

'00:00:13' "Begin!" Sugino shouted as all 7 students fired at the tentacles; both arms and all five feet was destroyed.

'00:05:00' Karma and the others started their boats and thrusted forward at full speed. The pressure of the boat against the hut caused the walls to be pulled apart simultaneously

"All right!" {Y/n} High fived Karma when she saw it was pulled apart successfully

'00:35:15" At the 35 second mark various of students floated out the water on fly-boards so they can create a hydraulic cage.

Leaving the teacher no way to escape since he is vulnerable against water, shocked was written across his yellow face as he started to realize he was running out of ways to escape.

"Koro-sensei doesn't do well with sudden change of environments" Nagisa spoke, his list of weakness is his top ally for this. Everything he written down led up to this moment

"From the chapel to the cage of water!" Sugino shouted "It'll confuse his weakened tentacles and slow down his reaction speed further more!" Maehara finished off