Unable to leave you (Nagisa x reader)

Part 14

It started to rain, Nagisa was covered in blood and we weren't anywhere near the class.
I decided to try and bring Nagisa back to the class by putting his arm around the back of my neck, and putting my arm at his waist to support him. "Okay, time to start moving" I said to myself. Time passed by and we were getting closer to the class but the rain started to pour even more. Suddenly I saw Koro sensei coming over to where we were. "Here let me carry him" said Koro sensei. I passed Nagisa to him and then we started to head back.

A few weeks later

Nagisa POV: "Hey Nagisa how are you feeling?" Said Maehara. "All better" Said Nagisa. "Class, today (y/n) will not be joining us" Said Koro sensei. I felt my heart stop for a second when I heard that. "Why...." I asked. "Hm?" Replied Koro sensei "What happened to HER?!?!" I asked in anger. "Nagisa you need to calm down" said Mimura. "SHUT THE FUCK OFF YOU ASSHOLE" I yelled as I bring out a knife. "YOU DON'T EVEN KNOW HOW IMPORTANT SHE IS TO ME, YOU ASSHOLE" I shouted as I started to walk towards him with a knife. "Come on Nagisa STOP" said Isogai as he grabs on me and tried to pull me away. I quickly moved from his grasped and sliced his throat. "Don't get in my way..." I said readying my knife so I can kill Mimura. "N-N-Nagisa stop! (y/n) she's just sick, because she was trying to bring you back to the class when you were bleeding in the rain" Koro sensei quickly said.