Hana, a busty wife whose husband and wife both work, works part-time and full-time five days a week. However, without her husband's knowledge, Hana is summoned to the public restroom on her way home from work by a middle-aged man who calls himself the "Manager." "It looks like we'll be able to work out the hourly wage increase, Haruna-san..." he says, luring the part-time wife into a multi-purpose fuck session in the station restroom. Her husband, unaware of the situation, is happy about his wife's hourly wage increase, but the wife's body and Kokoro are gradually corrupted by the daily acts...