Hasegawa is a bit of a high school nobody. He's plain, quiet, and unassuming...so it's a huge shock when Hiyama, the sunny social butterfly of the class, suddenly confesses to him! And how exactly does Hiyama intend to date a classmate he's never even spoken to before? By starting a good old-fashioned exchange diary, of course! That level of innocence from his popular peer comes as a surprise to Hasegawa, but he's game to give it a shot. Entry by entry, the mismatched couple manages to bridge the gap between them--and maybe even discover real love along the way...