When my mother found me, I was fighting with someone in the orphanage.
A group of people beat me up and I lost miserably. My nose was bruised and my face was swollen, but I won in the end.
Because I had been protecting a girl who was younger than me at the time, my mother felt that I at least still had some sense of loyalty and was unlikely to develop into a white-eyed wolf who would retaliate for kindness, so she took me home.
There, I saw the weak girl who had taken over my identity, and my twin sister who looked exactly like me.
Ps. First person.
Concept: The world is a giant pot of seaweed and egg drop soup