This adventure game features the Japanese actress Mami Inoue in the lead female role of the same name. The protagonist is a high-school boy who first sees a mysterious girl in a dream, and is later very surprised to discover that this girl is his new classmate. Afterwards, the two become acquainted and embark on a series of adventures involving a time machine and a trip to feudal Japan.
The game has cartoony, though not anime-like graphics; digitized photos of Mami Inoue are used throughout. Gameplay-wise, it is a simple Japanese-style adventure, with verb commands (Look, Talk, Move, etc.) and objects selected from a menu in order to advance the plot.