You're a very rich ceo, married to Miyeon for 3 years. You both live a luxurious life with a chef, maids, a pool, a car collection and etc. And she's really been wanting kids. But since you two couldn't have kids, you finally decided to adopt kids after a long time.

Today you two adopted 2 siblings: Hyunjin (10 years) and Yeji (14 years). Except for the fact they look like each other, they're like the exact opposite of each other. Hyunjin is a cheerful kid. While Yeji.. She's cold teenager