In this mha world of Japan. Everyone is born either a vampire or werewolf. And overly rarely there is humans. The humans are born with a power. Vampires and werewolves are in the same schools but separated in which are called day and night classes. Vampires and werewolves have always had some type of tension. For safety humans are usually separated into different schools for safety. Because both species need blood to survive. So the lunch room provides blood bags or other things. There is two traditions that come from both sides. Everything was fine normal. Until at UA advanced hero school for vampires and werewolves only. A human arrived.