My uterus fell in love. But it was someone other than my husband.

Tomada Maki is 29 years old and works as a sales clerk for a house manufacturer. She is trusted by her colleagues for her efficient work, but she has a personality that makes it difficult for her to assert her feelings, and she is troubled by the fact that she cannot tell her husband, whom she has been married to for six years, how she really feels.

One day, when Maki is asked a rude question by her boss, her colleague Yamate Asahi sees her and says, "It's irritating to watch him." However, Maki is confused by Yamate's distance, who sometimes pushes her away and sometimes shows kindness and concern for her health, but then he suddenly kisses her! Maki's heart is torn between Yamate, with whom she has instinctively fallen in love, and her position as a married woman.

Meanwhile, her husband Tomada Kyoichi, who is cold towards Maki, is he dating Yorishima Miyumi, a senior colleague whom Maki admires?

What will become of Maki's extramarital affair, with her hormone balance and image of an ideal couple now thrown off?