Ru Ni Suo Jian Zhe Shi Bai He Man

When the timid Wu You moves to a new high school, she quickly grows attached to her new deskmate, the gregarious Ye Yin. But there is more than meets the eye with Ye Yin, and as the days pass Wu You's feelings begin to deepen. A love story between two secondary school classmates.

Source: MyAnimeList