匿名信：失心者 / Stayer

Anonymous letter: the loss of heart is the beginning of the series of anonymous letter puzzle game, mainly tells about the intern detective man because of receiving an anonymous letter and broke the original quiet, when the letter instructions came to the abandoned 13 high school, found that everything has changed, is the trap? Or the truth? Numerous secrets and once unknown past events gradually emerge to the surface as I step into the campus at that moment to collect all kinds of props and clues, complete the complex puzzle game, and finally uncover the truth please follow this heart, to solve the mystery one by one who is the real heart lost