After failing an entrance exam due to the shock of a terrible heartbreak, Sunao Saiki left home determined to make a change. At a restaurant where he works part-time, Sunao met Ayano Shinonome, a kind, mature and attractive older woman. Sunao finds out that they share the same apartment and he and Ayano grow closer, despite the fact that she is a married woman. Eventually, he learned that her first love was his uncle, who looked a lot like him, Unable to control his feelings of longing and jealousy, Sunao seeks a deeper relationship.

In the midst of memories of her pale first love when she was young and Sunao's straight feelings for her, Ayano's heart is also shaken between her husband who leads a sloppy life...