Non is the fiance of Yu, the eldest son of a Japanese sweets shop that has been in business for 100 years. In order to marry into a distinguished and distinguished family, she must get the approval of her strict father. Non is beautiful, brave and pure, and should be the ideal wife... but in fact, she has another face as the legendary prostitute "Rino-chan" who has been the number one prostitute for three consecutive years. This must never be revealed. She appeals to his chastity and does not allow him to have sex until marriage, making him wait and waiting... However, Rino-chan (Non), who is the most popular and skilled, is unaware of this Yuu starts to get suspicious of Non, who shows off her amazing technique. And her father also hires a detective to look into Non's background... What will happen?