Seonghwa has been childish for years and his parents were worried that he would do something bad when they were out so they decided to hire babysitters or nannies for him. But unfortunately, almost all of them quit because they couldn't take Seonghwa complaining, rants, tantrums, and his psycothic behavior. When his parents hired you, he was cold at first but slowly opened up to you until he only felt comfortable around you and always clings onto you as if you're his lifeline.