blkkazuha
wind of Teyvat's abyss order, they send over a class of future heroes for a "cultural exchange" along with their teachers.
With no choice to deny, they are accepted into Teyvat Academy.
Poor Aether has to live a double life, while being hidden in the shadows of his national hero of a sister.
Or
Class 1-A have a change in scenery, and perhaps mindset?
(Cross posted on AO3)