■Kim Tan (18 years old) – played by Lee Min Ho – the heir of Empire Group. His mother is the mistress of the Chairman of the Empire Group. The Chairman lives with Kim Tan’s mother and is separated from his legally married wife. Kim Tan has an older half-brother Kim Won. He and Cha Eun Sang like each other. ■Cha Eun Sang (18 years old) – played by Park Shin Hye – grew up with Yoon Chan Young, she considers herself the heir of the poor. Her mother is the housekeeper for the Kim family that owns the vast Empire Group. Eun Seong has an older sister. She and Kim Tan like each other. ■Yoon Chan Young (18 years old) – played by Kim Woo Bin – his father is the Secretary for the Empire Group. He is currently dating Lee Bo Na (see 6 below). His father and Rachel Ryu’s mother were former lovers. ■Rachel Ryu (18 years old) – played by Krystal or another young actress – the heir of a major hotel group, engaged to Kim Tan and has a one-sided crush on him. Her mother is the president of the hotel group, and re-married the chairman of a resort conglomerate, who already had a son Choi Young Do (7 below), who becomes Rachel’s unrelated-by-blood older brother due to her mother’s re-marriage. ■Kim Won (31 years old) – played by Choi Jin Hyuk – the current President of Empire Group, older half-brother of Kim Tan. Kim Won’s mother is dead. Kim Won is dating Jeon Hyun Joo, a high school teacher at Empire High School. ■Lee Bo Na (18 years old) – played by Krystal or another young actress – former girlfriend of Kim Tan, currently dating Yoon Chan Young. She is the heir to a banking conglomerate. ■Choi Young Do (18 years old) – not yet cast – older brother to Rachel Lee, heir to a resort conglomerate. ■Lee Hyo Shin (18 years old) – played by Kang Ha Neul – rich boy classmate who has a one-sided crush on high school teacher Jeon Hyun Joo, who is dating Kim Tan’s older half-brother Kim Won. ■Jo Myung Soo - played by Park Hyung Sik - came from a rich family but doesn’t care about money or prestige.