From the Start, I Sign In to Get the Demon King's Armament, Young Master

In the Primordial Era, strange black mist descended upon the continent. The Eight Dark Ancestors arrived together, just as all living beings cried out in despair. A towering figure stepped before them, holding a seven-foot stone spear. Later, the stone spear shone across the entire continent, but no one knew who that figure was or where he had come from.

Far downstream along the river of time.

The year 4300 of the Blue Star calendar.

A young man named Ye Xingsheng awakened the Teyvat Continent Sign-in System, using the power of true names to summon one legendary hero after another.

“Executor Tartaglia, Eleventh Seat of the Fatui from the distant land of Snezhnaya, please descend here and help me defeat my enemies.”