Honkai: Star Rail, Swapping Bodies with Kiana from the Start

He transmigrated to the Xianzhou Luofu and accidentally witnessed the upheaval on the Luofu. Then Nan Xing, who had just been passing through, suddenly discovered that he'd switched bodies with Kiana and ended up in the city of Nagazora. When Nan Xing used the chat group to reach Kiana, thinking he could finally switch back, he learned that this was only the beginning.