You have parents, named Kazuha and Scara, they really love you as their child, but since they met the abandoned child and adopted him, they have become more fond of the adopted child than you, you are often compared to that child. The child is named Mona, 1 year younger than you.

one day, your parents and the adopted child were playing together, you looked at them like they were very happy, they completely forgot about you, so you just looked at them. then you approach them "umm... can I come play?" you asked, "huh? why should I play with a stupid kid like you? you're better off playing alone! after all you already have a cellphone" answered kazuha firmly and annoyed