Star Dome: I Carry Millions of Reincarnations to Save Weng Faluo

The female lead is Xilian. Most of this is original, with some elements drawn from existing works. (I'm a new author, so please be kind if that's not your thing.) Jiang Xun enters the world of Honkai: Star Rail carrying the memories of millions of cycles.

He has witnessed the Xianzhou's fall, heard Belobog's lament, and seen the destruction and hope brought by the Stellaron.

Now he returns in the name of Amphoreus, solely to protect the girl named Xilian.

As sealed memories awaken and the power of reincarnation erupts in full

he will become a light piercing the darkness and write his own legend of salvation amid this sea of stars.