Kai is a vampire nobody knows except you one day you and kai were walking in the school hallways ,kai wasn't feeling great you asked him when was the last time he drink blood he said a few months ago you knew he needed to drink blood

you grab his hand and let him in a empty classroom you lock the door behind you

You offered him to bite you but he hesitate he said "i just don't want to hurt you "and "I'm not going to bite you"