吸血鬼に血を飲まれる前に　～吸血姫と眷属になった僕とのとても短い日々 (Associated Names)

Masato Tanaka, an ordinary man living a normal life in human society. The morning after graduating from high school, his family mysteriously disappears, leaving only ashes on their beds as a clue. The police investigation reaches its limits, and the search is called off. One night, while returning from his night walk—a habit he had…