Ever since his college days, Shunji Naruse has been in a relationship with the female president of a real estate company, Mizuru Kozuki. Even now as a working adult, he works as her private secretary.

One day, Shunji’s pleasant life gets even better when he befriends a uniformed 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…