The Tsujii couple work for the father-in-law's company. To expand the business, the husband is sent on a one-month business trip overseas. His wife, Honoka, who can interpret, naturally plans to accompany him, but her father-in-law stops her... Honoka feels Kokoro being alone with her father-in-law while her husband is away on a business trip, but she opens up to her friendly father-in-law more and more each day. However, this kindness is a trap set by her father-in-law, and when he realizes that Honoka has opened up to him, he begins to use his position as his son as bait to make Kokoro. The father-in-law then dresses Honoka in a maid's uniform and transforms her into his personal sex slave...