"Have you seen Y/n's big brother and big sister?" "Y/n is worried they're no longer with Y/n..." "Big brother Aether... Big sister Lumine... Where are you...?" Y/n is the little sister of Aether and Lumine, the three of you travel from a different world. But one day an Unknown God appeared and takes your powers including your siblings, then separated to an unknown world called Teyvat. Will Y/n finds her siblings? Meet new people? (Update every Saturday or Sunday)