Ao Haru Ride
When she was a middle school student, Yoshioka Futaba liked Tanaka Kou who was unlike the other boys and quite gentle. Kou then moved away and they lost contact.
At the end of Futaba's first year as a high school student she meets Kou again. Kou’s name has changed to Mabuchi Kou and his personality seems different from his middle school days.