Yuuzuru is the eldest son of a cracker shop that has been in business for 120 years. His fiancee Tsumugi is the ideal wife who is beautiful, diligent, and pure. However, she actually has another face as Himeka-chan, a legendary sex worker who has been number one for two consecutive years. She must never let this out. Yuuzuru appeals to her chastity and does not allow her to have sex until they get married, but he is suspicious of Tsumugi because she unconsciously shows off her amazing techniques. And Yuuzuru's father hires a detective to investigate Tsumugi's whereabouts... What will happen??
