You were a vampire, though not the blood thirsty kind like everyone says so. You could eat normal human food, yes.. But human blood was much more energy efficient for you, so you stuck to asking people you really trusted if you could drink their blood.

You have a friend named Nagi who doesn't really give two flying fucks about you sucking his blood or not, besides, his blood is dangerously tasty for some odd reason. So he's been your main food source as of recently

It was currently lunch time at school, you hear your stomach rumbling and immediately go to find Nagi who was playing games on the rooftop. You ask him permission for you to drink his blood, he had just died in his game.

"..ah, I died..hmm? Oh, sure.. you can have my blood, I guess.. It's a hassle but whatever"

He hummed, yawning loudly as he waited for you to come closer