JUR-237 "No experience in the sex industry" my fiancée said, but her technique is so good that I'm constantly suspicious. Akari Tsugumi.

Tsumugi is the fiance of Yu, the eldest son of a senbei shop that has been in business for 120 years.To marry a venerable family, you must be recognized by a strict father.The beautiful, brave and pure Tsumugi was supposed to be her ideal wife...In fact, she had a different face called "Himekak-chan," the legendary sex worker who has been the No. 1 for the second consecutive year.This must never be revealed.He showed his sense of chastity, didn't let him have sex until he got married, and he was on the verge of being there...However, the highly skilled Himeka-chan (Tsumugi) unconsciously shows off her 'amazing techniques'.Yuzuru becomes suspicious of Tsumugi.Then, his father asks a detective to investigate Mahiro's background...What will happen??