The Diverse Child

The Park family. They are made up of 5, Mr. Park ( Je Yi ), Mrs. Park ( Seo Yeon ), Ji Yeon, Jae Hyun, and Su Ji. Everyone in town knows them. They are the wealthiest, the most generous, and the kindest. However, there is a Diverse child in the family.
Park Ji Yeon, the Diverse child, is different from everyone in the family. She runs around the streets, vandalizing walls, getting sent to the principal's office everyday, and is always playing school pranks.
Mr. and Mrs. Park are going on a business trip to America for a while and hopes that Su Ji won't get into any trouble during her freshman year at high school, which is why Jae Hyun, the older brother of Su Ji, wants to do his best to avoid her getting into any trouble.
However, Park Su Ji wasn't always the bad delinquent she is now.