The main character, Ryoma Honjo, is a university student who is living alone for the first time after entering university and has started working part-time at a nearby bento shop during his first summer vacation. He is still new to the job and has some difficulties, but the people around him support him and he is enjoying his time there.

His mother's friend, Yuko Hayama, a former nurse, loves housework and is a motherly figure. She has a tendency to spoil him and always comes to check on him, so Ryoma can't help but indulge her. Maki Kenmochi, a senior at her part-time job and a former member of the track and field team, is a vivacious and caring person who is raising a child. Sometimes she gets angry with him, but she always follows up with him. Erika Tachibana, the owner of the coffee shop he frequents, has an aura of sex appeal, and enjoys teasing Ryoma about his lack of sexual knowledge and watching him freak out.

While he has never had a girlfriend or relationship, he finds himself curious about three women ....... The story follows the development of a sweet relationship with these three married women.