Mei is living a strained marriage with her husband. At this time, she is approached by her longtime female friend, Rio, and ends up having a lesbian affair. Unlike her crude husband, Rio is gentle and kind, and as they meet several times, Mei begins to feel a sense of fulfillment that her husband couldn't provide... Mei's heart wavers as she finds someone to fill her loneliness, but then her husband finds out about her lesbian affair...? Perhaps displeased by their mutual attempts to protect each other, he becomes furious...