You Made My Dawn.

Fukagawa Seiji is a high school student with silver color hair. He is free-spirited and fond of painting. He tells people exactly what he thinks, but he also has a mysterious side. His classmate is Niwa Akane. Akane is a model student who always wears a face mask. At first, she doesn’t like Seiji, but she is attracted by Seiji's paintings and his blunt personality. They get close with each other, and they both have their own secret they can’t tell anyone. Adapted from the novel "Yoru ga Aketara, Ichiban ni Kimi ni Ai ni Iku" (When the Dawn Breaks, I’ll Be the First to See You)