Ever since his college days, Shunji Naruse has been working with the female president of a real estate company, Mizuru Kozuki. He works as her private secretary. One day, Shunji's pleasant life gets even better when he befriends a girl, Chisato Hinata. Things grow even livelier when a divorced wife and one of Mizuru's old classmates, Kasumi Tachibana; as well as Chisato's friend, Hasumi Tachibana—get added to the mix. As his various acquaintances begin to interact in ways they were never supposed to, Shunji finds his social circle expanding farther than he could have ever imagined...