Comprehensive Comics: the Only Protagonist

This is a world where countless animations are integrated, and the world view is extremely huge. Holy Grail War, Devil's High School DXD, White Album 2, Passerby Heroine, Tokyo Ghoul, Gray Trilogy, Fate No Sora, God Killer, Red Eyes... Bai Li returned to when he was fifteen years old. "In this life, I will have no regrets. I want to enjoy my true youth." The fate of all the protagonists is integrated into one. Alternative meaning: the only male protagonist, the destined son. No thunder, no poison, no depression, decisive in killing, not an upright gentleman, not a saint. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.