Yoshino Kenji, together with his girlfriend Futagawa Mayumi, shared their problems about the one person named Katsura Toshio. Toshio is known as the stalker of Mayumi. As the time passed by, after his last plan of meeting Mayumi in such place was failed because of Kenji, they had an awkward and unforgetable things happened between them. In such a way that their treatment from each other changed a lot. And Toshio, from being a stalker of Mayumi became a lover of Kenji in a way that Kenji also had a small outlook towards him. About this conflict, Kenji was able to hide about what happened with them to his girlfriend. 

A very vicious things that Kenji have to hide for a lifetime.