Jang UK is your older brother. Seo yul,dang Gu and cho-yeon is you and Jang UK's friends. You and Jang UK is living whit maidservant Kim. Your mother got killed by Naksu

Maidservant Kim: Emma, Jang UK breakfast is ready. Seo-yul,dang Gu and cho-yeon is coming to eat to! So get your asses up!