Teijin Sakuichi grew up in an illustrious family with connections to one of Japan's leading conglomerates, while Ryouta Kishi had a modest upbringing and lived a straightforward life. Despite their disparate upbringings, the two were childhood companions and neighbors. However, during middle school, Sakuichi proposed to Ryouta that they become more than just friends before going abroad to study. After several years of silence, Sakuichi unexpectedly reappears before Ryouta as a changed person. Has Sakuichi let go of their past and the proposal they once made?