Lipstick Adventure 3

This entry in the Lipstick Adventure series continues the story of the young private detective Gorou and his sweetheart Otomi. After attending a friend's marriage ceremony, they return to Gorou's office and find a strange package in the flowers. The package contains pictures of Otomi and several other girls, her schoolmates, some of them naked. Gorou heads to Otomi's high school to begin the investigation, without realizing that he will soon become involved in a sinister conspiracy...

Like the previous games in the series, "Lipstick Adventure 3" walks a fine line between adult and non-adult games, having graphical nudity and plenty of sexual innuendo, but no explicit sex scenes.

[From Moby Games]