Shine.

This manga contains three stories.

Story 1: Shine
Maki is a shy girl secretly in love with his sempai at the photography club. Just when the mood is getting better between them, she meets Akihara, a very rude and straightforward guy she can't really deal with.

Story 2: Slowly, my Lovely
Fuuka has been really nervous since her classmate Kenji Tokuda confessed to her. Even though she hasn't given him an answer yet, he acts as if nothing has happened...?

Story 3: Before the Promise
During winter break, Yui met Hisashi in the mountains and liked him almost instantly. But then she had to leave without even telling him, so when they meet again months later, he's not very pleased to see her.