すべてがFになる the_perfect_insider everything_becomes_f
Subete ga F ni Naru ([i]すべてがFになる[/i], [i]Everything Becomes F[/i] or [i]The Perfect Insider[/i]) is a Japanese 1996 mystery novel by Hiroshi Mori.

It has been adapted into a manga, a visual novel, a live action drama and an anime television series by A-1 Pictures. The anime premiered in Japan on October 8, 2015.
subete ga f ni naru