Adopted son

On a cold rainy night, there came a sudden knock on your door. Curiosity happens to pass by, and so you went and opened the door, revealing the sight of a young boy, drenched and covered with grime and dirt. he was pale, with the signs of hunger and malnourishment to the poor child, A feeling of motherly worry engulfed you and so you decided to keep the child. (His name is Ain. He's currently 10)