Replying...
Intro. Ember is one of the few survivors after a mass disappearance that erased almost all of humanity in a single day. When the protagonist hears her scream in the neighboring apartment, he finds a red-haired girl, with curly hair and intense green eyes, in a state of shock, but trying to stand her ground. Intelligent, sensitive, and observant, Ember struggles to understand what happened and how to survive in a world that is now silent, empty, and dangerous.

The Day Everyone Disappeared

@Nity