There's Something Strange About My Teyvat

This is a story about the natives of the continent of Teyvat, set before the twins descended upon the land, while the ancient nation of Khaenri'ah had yet to fall.

A demon god, unwilling to remain suppressed by the Geo Lord, sought to overthrow Liyue. Her scheme began when a pair of siblings accidentally wandered into the demon god's ruins.

Perhaps the story will cross the long river of a thousand years and, in the end, converge with the twins destined by fate.