The Wanderer in the Old World Before the Honkai

An anomaly who transmigrates to an unfortunate world. His goal is to make up for past regrets and fight for everything beautiful in the world. The worlds planned for now are Honkai Impact 3rd and Genshin Impact. Later, he will transmigrate to other worlds, such as Naruto and Tokyo Ghoul, among others. No System. The protagonist is intelligent, the female characters won't simply fall into his arms, regrets will be addressed, and there will be no harem. The relationships are purely platonic. Finally, a word for readers: I hope this story can offer you some comfort after your studies or work, and kindle your hope for a better world.