すべてがFになる　～THE PERFECT INSIDER ～

The player has to investigate and discover who was the murderer of a genius that was murdered in her private laboratory isolated from the outside world with the doors closed and the only clue was a mysterious message that was left.

The player controls Kiryuu Wataru, a young fourth year university student in the faculty of engineering and architecture who is into mystery novels. To solve this case he will have the help of Nishinosono Moe (a first grader girl in the University Department of Architecture & Engineering) and Saikawa Souhei (University Associate Professor, Faculty of Engineering, Architecture) and other characters.