Sekai de Ichiban "Kawaii" Amamiya-san, Nibanme wa Ore. The Comic

Hikari is a popular model nicknamed the "Cutest Girl in the World," but behind that gorgeous female façade is an ordinary high school boy named Harema Kouki! Since his model self is so adorable, Kouki never really finds other girls cute...until one day, when he realizes his plain and boring classmate, Amamiya-san, is actually cuter than he is! A high school rom-com between an overconfident diva and a diamond in the rough!

(Source: Seven Seas Entertainment)