Hinatako married her husband, who was a colleague at work. Her husband, Makoto, is kind, earns a good salary, and seems to live a life of luxury. However, Hinatako has one complaint: she has never orgasmed during sex with her husband. Hinatako feels guilty towards her husband and keeps her dissatisfaction buried deep in Kokoro... But one day, she is invited on a recreational trip by the manager and colleagues of the company where she is dispatched. She never expected to experience her first vaginal orgasm on that trip...