Read manga: You, The One Sitting Next To Me, Are The Cutest.

manga
Summary:

Enter Hoshikawa Yuu, a boy cute enough that people mistake him for a girl,  and Kohinata Akari, a classmate of his who recently moved her seat next to him.This is a story about the two high school students sitting next to one another, and who each think that the other is the cutest one around.