Teyvat is a world blessed by the 7 Elemental Archons.
Though the calamity the world suffered has ceased, and the lands have slowly healed, peace has yet to be restored to Mondstadt, the city of wind.
The domineering Fatui have been oppressing the surrounding city-states, under the guise of protection, while an ancient darkness is seeking a chance for revenge…Description via official website
Genshin Impact Manga tells story about event that happened before traveler arrival in Mondstadt. First story (Chapter 0 Prologue) involving Vanessa, the first Grand Master of Knight of the Favonius and fall of Lawrence Clan. While chapter 1 up to 16 is about Collei story during her time in Mondstadt.