Genshin Impact: After the Journey Ends, My Memories Are Revealed!

[Caution: Lots of author-created details, characters are extremely OOC, Zhongli x Xiao] When the Traveler's journey reaches its end, she and her twin choose to join the gods of Teyvat in overthrowing the Heavenly Principles. In the end, the Heavenly Principles are overthrown, but everyone pays a terrible price. Liyue's last Yaksha falls, and the Traveler leaves the continent of Teyvat with her badly wounded twin to search for a cure. Once everything has settled, peace returns to Teyvat as before. But is that really what happened? A memory that suddenly appears in Chenyu Vale exposes everything. What is the truth of this world...?