It has been half a year since Mikuni Tsukasa was dumped by his boyfriend of 6 years.

Even after starting his new job as a high school teacher, Mikuni still cannot get over his feelings from the breakup. In a desperate effort to forget these feelings, he goes to a gay bar and there, he accepts a stranger's invitation to drink together.

But then a man with a huge body frame suddenly appeared and started meddling with Mikuni's night.

One day, Mikuni had to do a preliminary inspection for a school trip and there he met Matsuda Shougo, who is none other than the meddling huge man from that night!