"I apologize, but I am actually not a girl," Saku revealed to Kyousuke who had mistaken him for a girl since childhood. When Kyousuke finally realized Saku's true gender, he had already fallen in love with him. Despite his apprehension that being with a boy like him would be a burden for Saku, Kyousuke was shocked to discover kiss marks on Saku's back one day. Thus began their complicated journey of love as childhood friends.