Would You Suck My Blood?

In a modern Japan where vampires and werewolves are commonplace in society, Kioi Uzuki runs a sharehouse with his grandmother. He's super excited when they get their first vampire tenant, but their first meeting is a bit of a bumpy one. How will this shy and closed off vampire react to a bubbly enthusiastic all-things-occult-loving human who really wants to be his friend?