Yamada Aoi and her husband, Kenichi, are a happy married couple. Kenichi is a perfectly ordinary man but he has a fetish for cuckolding. He repeatedly has Aoi cuckolded by numerous men and she ends up pregnant with one of the other men's sperm.
Story for Part 11:
Aoi goes on a cuckolding trip with her husband's boss, Director Kurosaki... The setting is a hot spring inn. Waiting for them there are her husband's colleagues who have been summoned under the guise of a company appreciation party. After hearing their stories of how they are regularly bothered by Director Kurosaki's power harassment, Aoi offers to provide sexual services at the hot springs. While this fulfills her husband's cuckolding desires, does it also mean that things are going according to Director Kurosaki's plan...?