When a vampire encounters a donor enthusiast, what could possibly unfold? Akabane Yuki, a well-known nurse, happens to be a vampire descendant, and he becomes especially enamored with the delectable blood of donor enthusiast Mayuzumi Osamu. Thus, Yuki takes it upon himself to tend to Mayuzumi. However, one day, Mayuzumi abruptly declares to Yuki that he plans to cut off all contact with him. What caused Mayuzumi's sudden change of heart?