Mio and her husband have been married for two years. Mio feels unsatisfied with her husband, who is kind and sincere, but somehow unmanly. On such occasions, she is a colleague of her husband's company who often comes to visit Mio's house. A co-worker takes a liking to Mio and presses Mio into having a relationship with her while her husband is away... Mio resists at first, but she is attracted to the masculinity that her co-worker's husband lacks...