Even a Replica Can Fall in Love Episode 13

On days when Sunao is sick, or not feeling like going to school, she is called to take her place. She was born to this world when Sunao wished to have a substitute. No one knows that she exists, but she tries to do her best for Sunao whenever she is called. One day she talks with Sanada, one of her classmates. They become friends, but soon he notices that she is different from the original Sunao..