Asami is a 29-year-old housewife. Her relationship with her unfaithful husband is not great, as she is always fighting with him. One Sunday morning, when she goes to do the laundry, she notices a kiss mark on her husband's shirt. The couple gets into an argument over it, and her husband tells her to get out of the house... Then Asami bumps into Tatsu, a university student who lives next door to her in the same apartment building. Worried about her, Tatsu realizes what's going on and comes over to her house to listen to her. His kindness and consideration makes her explode with emotion...