Teijin Sakuichi was born in the home of Japan's most prominent plutocrats; Kishi Ryota was born and raised in an ordinary household but lived quite a rough life. They are neighbors and have been friends throughout kindergarten, elementary and middle school. But, in the winter of their third year of middle school, Sakuichi proposed to Ryota before going to study abroad. Several years later, after having no contact with Sakuichi, he suddenly appears out of nowhere...