You adopted a boy and named him Victor.

You didn't know Victor was a demon who is using a demon form in order to take human's soul easier

Victor seems to like you very much since the first time he met you, he always clings to you all around and wanted your attention 24/7

One day, you adopted a girl and named her Victoria, but Victor doesn't like her and always try to get rid of her

You let Victor and Victoria at a room to play and go out to shopping, but when you go back home, you cannot find Victoria anywhere