Koro-Sensei X reader (Re-upload)

Chapter 8

I stayed by my mother's side all night, she looked ghastly pale. By morning she was looking no better so I decided not to go into school so that I could look after her. It got to around 12 when Koro-sensei appeared behind me, making me jump. Mother was awake at that point and she looked scared to death, "y/n why aren't you in school today?" I explained to him that mum was sick and I needed to look after her, "ahh very well, might I give some medical advice?" I nodded and he bent over my mum, her reaction was priceless, "y-y/n? I t-think this illness i-is making me hallucinate," I chuckled and Koro-sensei did too, suddenly a white ball appeared in one of his tentacles and he put it to mums head. This knocked her out cold and he turned to me saying, "That should destroy the illness's body and kill all of the cells that were taking over her internal system," he suddenly pulled out a book that the front cover read 'What to do if someone you know has swine flu' I cringed a bit and said, "Sir do you have a book for everything?" He nodded, "Nufufufu, I actually only wrote this one this morning, lucky timing huh?" I laughed and before I knew it, I was in his coat flying at Mach 20 to school. He told me that mum wouldn't remember him and she'd wake up like new thinking it was all a dream. Man I was grateful for Koro-sensei. What would I do without him? We arrived at school and afternoon lessons began as normal, I couldn't help but notice though that Koro-sensei had a bag behind him, maybe it was Karasuma's and he'd just forgotten it? Nonetheless Koro-sensei carried on as if it wasn't there. Thankfully today we had a break from the tests as it was Wednesday, now only two more to go. The bell signalling the end of the day came and once again I stayed right where I was. I was confused when I was carried into the P.E shed but calmed down when I noticed it was only Koro-sensei but he was carrying the large bag that was behind him all day. When we got to the entrance of the shed, I opened the door and saw that all of the windows were boarded up and there was only a chair in there. Koro-sensei turned to me and said, "Can I try something with you y/n?" I was a little worried but trusted him so I nodded, "Alright, don't be scared y/n, I'm not going to hurt you, think of this as another lesson," he told me to sit down in the chair and he opened the bag. Out of it he pulled a blindfold and a pair of handcuffs. He put the handcuffs on me and the blindfold over my eyes. I was getting scared. I heard the rustling of fabric and a rush of cold air hit me. I suddenly felt something cold and wet on my stomach, making me shiver, "Koro-sensei, what is that?" I asked in a careful tone, "Don't worry y/n,everything is ok, it's an ice cube," gosh no wonder it felt cold. I then felt a glass vile being placed to my lips and a warm liquid flowed into my mouth. I drank it all and it tasted amazing, like some sort of sweet and sour cake. I licked my lips and a peculiar feeling took over me, it started at my throat and spread over my body, it was warm and it tingled and making me shudder, "Koro-sensei what was in that vile you gave me?" I heard him laugh and say, " You will know in due time my dear, all will become apparent," I then felt a wave of heat in my lower abdomen, oh god this was more than I could take. I heard another rustle of fabric when I felt a pair of lips on mine. Then I felt Koro-sensei's warm touch, and this feeling was getting really strong now, it yearned for more, yearned for all of Koro-sensei. It was unbearable.