After being laid off from her temporary job, her son Hiroshi returns to the family home where Minako lives. Seeing that Hiroshi is depressed despite their long awaited reunion, Minako invites him to take a bath with her. In the steamy bathroom, Hiroshi can't help but bury his face in his mother's large breasts... That evening, as Hiroshi is relaxing, he gets a call on his mobile phone from his senior colleague, Isamu. Isamu tells Minako that he's been laid off from his temporary job and has nowhere to live, so Minako decides to let him stay at her house for a while. However, this decision creates a rift between them...