There's Only a Campus Where I Don't Exist

Fuji Yuming has three regrets in his life: The dead father, the unfinished comics, and her disappearance. ... When he was 27 years old, an unknown murderous madman appeared in the city. Teng Yuming never imagined that the madman would be related to him. In order to save the dead, Fuji Yuming, who has the ability to reshape time, unexpectedly returned to the beginning of all stories. He modified the original story line, Everything seems to be moving in the right direction, But is it really so? Although he is actually much older than his peers, he always feels out of place on campus... At the same time, he meets a girl who is equally out of place... She never seems happy. (A suspenseful story about campus youth.)