After being laid off from his temp job, Hiroshi returns to his mother Minako's home. Seeing Hiroshi without any energy during their long-awaited reunion, Minako suggests, 'Let's take a bath together.' In the steam-filled bathroom, Hiroshi instinctively buries his face in his mother's large breasts... That night, as Hiroshi is relaxing, he receives a call from his senior, Yuu. Yuu tells him that he has been laid off and has nowhere to live. Minako decides to let him stay at their home for a while. However, this decision creates a rift between Hiroshi and Minako...
