(Note)

In a world called Teyvat, there are two siblings wandering over the world as they begin to travel to the next world. Until an unknown god blocked their path. They fought the unknown god with everything they have... Until one of them got captured.
The girl named Lumine saw her brother, Aether, who got caught by the unknown god's red cubes as the god captures Aether, turning him into some kind of a small cube. Lumine tried to save her brother but unfortunately, she got captured as well. The last thing she saw before she disappears was her brother who got turned into a cube at the hands of the unknown god.

Afterwards, she woke up in a forest, alone. The first thing that comes to her mind is how to get his brother back from the unknown god. While she was busy thinking, she found someone lying on the ground. Lumine found a boy with a curly green hair lying on the ground, unconscious.
What Lumine did not know, is that this boy will change her life.

A/n: Izuku has One for All :v