...'s manga / #unrequited love(112)

Chapters 1-3.5: highschool student befriend a classmate to get close to the sister but the classmate thought that he's the romantic interest, shocked when he was just being used but he confessed and slowly they become an item. Chapter 4-5: group of 4 university students, 2 are a pair, 1 of them is messing/ teasing the one they like.

Sequel: Yoake Ni Furu

Prequel: Yozora no Sumikko de