Love triangle, bullism at school, misunderstanding...
3 school mates meet after 9 years. One has becoming a president of school, one a teacher and the other poor guy still a student.
The last one is a gentle and awesome person that was misunderstood, in the past and still yet, and unfortunately he was unable to graduate. He has a second chance to come back at school when he is an adult, 9 years after. The teacher is right his "ex girlfriend".
He will be able to win her back and together they will fight against injustice.
This series seemed too long to me, it was so heavy to reach the end that I put it aside several times.