- the 1st couple is teacher x student. The sense was afraid to accept someone in his life. So in the first he is avoid Kei. But in the end was happy ending! The sensei is tsundere tho
- the 2nd couple was Incest!!! Seiji adore his little brother so much. He is possesive to him, and Akira gladly accept it because he is lonely. So it's concent
Yukimura-sensei To Kei-kun