One day Aether is in the nation Liyue, unable to summon an Abyss Mage due to his low stamina and lack of power at the moment. While in Liyue he unexpectedly runs into his lost twin Lumine, but he does not wish to speak to her and when he wants to leave he is met with something else.... Xiao Some smut and some fluff, but mostly them being idiots and fighting