Fuji knows better than anyone else that he cannot beat time, it will wash away all memories until they are blurry. The people and things that should be remembered forever are just fading promises that have passed by in a hurry. The past when I was young was so unreal, tennis, championships, U-17, and Tezuka's departure.
If it was an accident to return to Qingxue as a teacher, then meeting Tezuka, who was also a teacher in Qingxue, was an accident.