The young man who doesn't have the edge of the toothbrush who is good at the despair wheel

In his student days, he had the ability to win in the National Convention of swimming, and he went to his school as a teacher and served as an adviser to the swimming club. It used to be a prestigious school of swimming, but the period changed and the swimming club was weak and the crisis of survival continued. Although it was decided to be rearranged, the heat of the guidance became idle, and a big groove was made between the students. The groove deepens and it changes to hate, and the students contend that there is...