Following the life of Sumito Kayashima, the series portrays his indulgent and idle lifestyle. Despite having abundant financial resources, he lacks motivation and squanders his wealth by attending parties and purchasing unnecessary items like unread books and antiques. His secretary/caretaker, Koizumi, manages his daily affairs and interests.
Despite his innocent and reserved demeanor, Sumito's true nature emerges at night as he displays cunning and an insatiable desire.