Ena has been married for a year to her husband, who was her co-worker. Her husband, Makoto, is kind and earns a good salary, and it seems that she is living a comfortable married life. However, Ena has one complaint: she has never orgasmed during sex with her husband. Ena thought that this was because she was not sensitive to sensations... But one day, the manager of the supermarket where she works part-time and her co-workers invite her on a recreational trip. She never expected that she would experience her first vaginal orgasm on this trip...