Tenya's life, as a skeptical person, was, to put it mildly, turned upside down when one day, while making his daily run somewhere in an average city park, he was attacked by a real rather fanged vampire, subsequently, successfully surviving it, noticing signs of vampirism in himself...

However, even after becoming a real vampire, who, by the way, did not burn in the sun at all like in the movies, Tenya even managed to sort out his whole life again and successfully hide this new fact about himself from his acquaintances and friends, but not from his family, anonymously ordering the required number of blood bags, which, as he himself discovered through self-experimentation, was sufficient to successfully control, as he himself put it: his "wild impulses"

At least, everything was under control until Tenya, currently in the storage room of the UA Hero Academy, during a short break between classes, where no one could notice his little moments of "feeding", discovered the sudden loss of his bag of blood in his briefcase, panicking so much so that he even turned the briefcase upside down, in the blink of an eye emptying all its contents onto the floor with a loud thud and starting rummaging through it, realizing in the process that the package was really missing...