A certain girl's high school has attracted the attention of the authorities: girls are disappearing, and there are rumors of strange cult-like activities going on in the school. Secret service sends a female agent (codename "Akiko") to the high school. Posing as an English teacher, Akiko must unravel the mystery - which she eventually does, though not quite the way one would expect from a special agent... The gameplay is very simple Japanese-style adventure: every screen presents a menu of possible verb commands and objects ("Look at...", "Talk about...", etc.) By going through these commands, the player depletes available actions on the screen and moves to a new one. Sometimes it is possible to move around the school (also via a menu).