Choi Soobin an only child who is a little sadistic and ignorant. he can get whatever he wants. he lives alone in a luxurious mansion. once his parents adopted a younger child from him, sweet yeonjun. Soobin was a little jealous because he thought that his parents' love would be shared with the adopted child. "Damn! That child will shift my position!" quietly silent and got an idea. "let's play a little, hahaha!" he waits for the child to come to his mansion.