Yua Shinkawa

In a middle school, Yoshioka liked Kou who was unlike the other boys and quite gentle. Kou then moved away and they lost contact but in high school she meets Kou again. But now, he is not the same person anymore.

When she was in middle school, Yoshioka Futaba met Tanaka Kou whom she had mutual love. After Kou moved to Nagaski with his late mother, Futaba lost contact with him. In her first-year of high school, she met Kou who's now carrying the name "Mabuchi", who is now stoic, cold, and totally different from the gentle Kou he met in middle-school. (imdb)

Ayuha Samaru is a high school student. She is honest and works hard at everything, no matter what. One day, she has trouble at a gyudon restaurant due to money. A man at the restaurant, Yoshitaka Hiromitsu, helps her out. The next day, she finds that Yoshitaka has come to her school as a substitute teacher for her ill homeroom teacher. Ayuha now believes that Yoshitaka is her fate in love. She keeps expressing her feelings to him. (imdb)