Gekkou

A boy named Nonomiya, known for his cynical outlook and boredom, discovers a notebook belonging to Youko Tsukimori, a girl often spoken of in high regard. Inside, he finds a slip labeled "Murder Recipe," which he pockets out of curiosity. The slip, however, only presents vague scenarios that might result in fatal accidents, lacking any concrete plan. When Nonomiya brings it up to Youko the following day, she claims to have lost nothing. Shortly after, Youko's father dies in what is described as an accident.