Mahiro is the fiance of Yuzuru, the eldest son of a kimono shop that has been in business for 150 years. To marry into a distinguished family, she must get the approval of her strict father. Beautiful, brave, and pure, Mahiro is the ideal bride...or so she should be... But in fact, she has another face as the legendary prostitute "Licca-chan," the No. 1 for two consecutive years. This must never be revealed. She appeals to her chastity and does not allow sex until marriage, even to the brink... However, the battle-hardened Licca-chan (Mahiro) unconsciously shows off her "amazing technique." Yuzuru has doubts about Mahiro. So her father asks a detective to look into Mahiro's background...What will he do?