Two adorable children, who are abandoned, the mystery about their past life is dark

The first child is a little boy with black hair and blue eyes, he looks around 12 years old, his name was Sunshine

While the other child has fox ears and a fox tail, all the other features look like human features, he had white hair and orange eyes, he is around 7 years old, his name was Bluewave

They were at your doorstep, and you let them in