The Haruka family's daughter and her husband have bought a house. As their life together comes to an end, Ayane, the stepmother, feels lonely. One day, Ayane accidentally finds out that her daughter's husband, Makoto, has a big dick... Unable to suppress her carnal desires, Ayane bites down on his big dick. Unable to resist her voluptuous behavior, Makoto becomes addicted to his stepmother's ejaculation service, which is performed secretly in the home. It was supposed to be a relationship until they moved, but before he knew it, he couldn't bear to be without Ayane's body...