The story will revolve around our protagonist, Lumine, searching for the missing 4nemo member, who is also her twin brother, Aether. Aether left Lumine to attend a special school for element user (vision users in this AU) when he awakened his power. But not long before Lumine awakens her power to join the school, Aether disappears and 4nemo disbands. Now already obtaining her power and managed to join the school, Lumine tries to revive 4nemo again by impersonating Aether as well as searching for clues about Aether's disappearance.
Accompanied by the self-proclaimed best companion, Paimon, Lumine interacts with the other 3 anemo boys from 4nemo (Venti, Xiao, Kazuha) to find more clues about Aether's disappearance and solved the mystery behind it. While at it, Lumine will also living her school life making friends and join the school activities to enhance her power as well as her abilities to perform.
[From Itch.io]