At the recommendation of a friend, the 38-year-old protagonist Matsumoto Jiji started a matching app out of curiosity. The app she looked at with trepidation was full of handsome younger men who didn't mind the age difference! And, women are surprisingly popular!? However, among the people she met, there were also many so-called "yarmoku" men who only wanted physical relationships. Aki, who got married early and had little experience with men, was confused while praising her late youth! Unconsciously, she was immersed in that world... She encountered "the current view of love" that was too different from her generation, and "the troubles and loneliness unique to women in their forties"...