Three years ago, Nana married a younger man, building a family life with Akira, her husband's son who is close to her in age. Lately, however, Nana begins to notice that Akira's gaze toward her has clearly changed. One day, Akira suddenly touches her body. Despite Nana's resistance, Akira seems to enjoy it, roughly groping her ample breasts as he pushes for a new kind of relationship...