The Fukiishi couple, who have been married for 10 years, have come on a hot spring trip on their husband's schedule. In contrast to Rena, who seemed happy about her trip for the first time in a while, her husband was excited. As I was enjoying the kaiseki cuisine that night, Rena lost consciousness right after she had put a drink in the mouth... When he wakes up, he is restrained in a dark, cold prison and is informed by the director of Oshima that he has been sold to a debt. Rena is ordered by Oshima to work as an anal slave, and has no choice but to accept the humiliation for her husband...