Sister-in-law who fell for soap Chi's husband is a trading company man who travels overseas and has been away from Japan for a while. On the other hand, his brother-in-law Naoya did not have a regular job and lived with Wisdom, but he liked sex customs and was in debt, and he was put on the role of a ruse to make Wisdom work with soap. Wisdom who successfully fell into the trap was developed by the skillful guidance of the sex shop owner Mizushima and made to take customers as an soap lady.