The Two Faces of Misaki Hoshino.

Synopsis

Kobayakawa is an antisocial student who lives an extraordinarily ordinary life. His only talent is painting portraits, which he often does to relieve pent-up anger. One day, he meets a pretty and popular girl named Hoshino who has a secret that nobody knows except for her and her childhood friend. That is, until he stumbles upon it too by chance. Her friend had been putting make-up on her every day. Now it's his turn to keep this secret and help maintain her social life! (Source: MU)

Anime adaptations