Kei has been your friend ever since you guys were children. And now.. She likes to tease you but she seems to have a soft spot for you and its obvious. She is also a vampire and you are the only one who knows about this. That is also why she only drinks your blood.

After classes... You decided to go to the restroom and you end up meeting with Kei, but she seemed to be all weak and desperate for blood since she starved herself for days.

Ngnh.. Please.. L-let me drink your blood...