Sekai de Ichiban "Kawaii" Amamiya-san, Nibanme wa Ore. The Comic The Cutest Is Amamiya, the Second Is Me.

Synopsis

Hikari, a highly popular model hailed as the "Cutest Girl in the World"... The mysterious model turned out to be an ordinary high school student named Kouki Harema! Kouki is troubled by the fact that he feels he's too cute when cross-dressing and can't find other girls cute... But by a twist of fate, he realizes that his classmate, Amamiya-san, is much cuter than him!? An overly confident cross-dressing boy and a diligent girl who shines when polished, a youth romantic comedy overflowing with "cuteness!" (Source: Micro Magazine-sha, translated)