Protagonist is a very usual without hesitation man.

He was in favor with a senpai at the same company "Hidaka Mai" who was an educator for the newcomer, after the education, i have given up because she had married.

Though it is senpai who was leading a happy married life, recent, the thing that the sigh has increased is noticed. While taking part in a consultation to energetic senpai, past feelings are recalled.

A certain day, way back from party of a post, the husband of Mai is witnessed with the feminine staff in the same company. Surely... Variously in the place in which it is worried, a coincidence, junior"Shirakawa Satone" rejoining...