Introductions

Jimin loses his parents in an accident and a friend of them that Jimin never met made a promise to Jimin's parents if anything happens to them that he'll take care of him. He decides to take Jimin to be a part of his family. However, what Jimin didn't know is that that man was rich and he himself had 6 kids. What happens when they meet Jimin and start to fall in love with him?