The Perfect Insider

"The Perfect Insider" (Japanese: すべてがFになる, Romaji: Subete ga F ni Naru), also known as "Everything Becomes F," is a Japanese mystery novel written by Hiroshi Mori in 1996, and the first book in the S&M series. The novel won the Mephisto Prize and has been adapted into various formats, including manga, a visual novel, a live-action drama, and an anime. The story revolves around associate professor of architectural engineering Sohei Saikawa and Moe Nishinosono, the daughter of his mentor, who travel to a remote island and investigate a locked-room murder at a research facility. The victims are a prominent AI researcher and the director of the lab. The novel is known for its unique blend of science and mystery, delving into philosophical and technical themes, and features extensive dialogue scenes. The anime adaptation, produced by A-1 Pictures in 2015, incorporates elements from the Four Seasons series, providing more insight into character motivations. The series also includes other adaptations such as manga, games and a live action TV series.