Modern City Honkai: Star Rail: I Opened the Door and Found Little Grey Hair!

【Urban setting + Honkai: Star Rail + Genshin Impact + daily life + protagonist is an Aeon + world combining multiple novels + no female lead + no CP + invincible protagonist】 Liu Yang transmigrated twice. The first time, he transmigrated into the world of Honkai: Star Rail. He made a bunch of friends there and became an Aeon. Then, when the story finally came to an end, he transmigrated again. The second time, he transmigrated into a parallel world. This parallel world was exactly like the one he had lived in before, right down to his relationships and the course of his life. The only difference was that this world didn't have the game Honkai: Star Rail. He decided to make the best of his new circumstances. After living in this world for a while, he came across a filthy little gray-haired girl. Later, lots of his other friends came here, too, and his ordinary daily life was supposed to carry on just like that. At first, everything was perfectly ordinary. He thought this parallel world was no different from his own until he was bound to a System and learned that this world was actually a fusion of multiple novels. Even a casual trip outside could bring him face-to-face with a Dragon King, a live-in son-in-law, a reborn immortal emperor... That alone would have been strange enough, but why did the novels merged into this world seem so... eclectic? Liu Yang: “Can someone tell me what a protagonist gong and protagonist shou are?” (There is no CP. A few chapters after the System binds to him, the protagonist completely destroys its self-awareness.)