The story revolves around a hardcore Onyanko Club fanatic who decides he wants to kill the girls to prevent the young, cute idols from getting old and married - in a sense, to preserve their youth for eternity.

The story of a young girl's first love is told from the heroine's point of view. Surrounded by various people, she finally begins to awaken to her own feelings as a woman.

Film adaptation of The Mysterious Murasame Castle game for Famicom Disk System.