I'm being fired every night between my mother and daughter sleeping in the shape of a river that was lustful for my big cock ... - Yumi Kazama

Yumi, a mother, finds herself in a complex situation with her daughter Tomoe and Xiao Wu, a man who is potentially becoming a part of their family. As the story unfolds, it becomes clear that Xiao Wu is engaging in intimate activities with both Yumi and Tomoe, suggesting a theme of incestuous and taboo relationships within a familial setting, specifically focusing on the acts of creampie and possibly other forms of sexual intimacy.