you live in sumeru, but got teleported to the Danganronpa world and got stuck in the 53rd killing game, a few weeks past in that month but a few months passed in teyvat, while you were in a trial you got teleported back with a watch that lets you transport through worlds, you teleported infront of Layla, Nilou, Alhaitam, Kaveh, Cyno, Tighnari and Nahida