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...

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...