MAIN CAST 

- Park Shin Hye (22 years old ladies , beautiful , very pretty with angelic face , pure ,childish , innocent , bestfriend of Jung Seung Ho , Lee Hong Ki and Yoon Shi Yoon ,bubble personality , kind herted , strong heart , don't know how to jealous, hates Jung Yong hwa , did not reconize her feeling for Yonghwa)

- Jung Yong Hwa (26 years old  , very handsome and good looking , kind , cold-hearted to Shin hye , workholic , struggle hard , older brother of Jung Seung Ho , have owns compony , one of billion air in korea , rich , jerk , likes to command people around him , easy jealousy , did not reconize his feeling toward Shin hye , always thinks negative to Shin hye , habits bullying Shin hye)

OTHER CAST

- Lee Min Ho (28 years old , fall in love with Shin hye in first meeting , kind , Yong hwa arrival , good looking , handsome , playboy , but changes after met Shin hye , one of billion air , try to catch Shin bye attention)

- Jung Seung Ho ( 22 years old , younger brother in  Jung family , act childish , bestfriend Shin hye , Lee Hong ki and Yoon Shi yoon , loves shin hye as friend , care about her , one accident makes shin hye live in Jung's house , always cause problem to Shin hye )

- Seo Joo Hyun ( 26 years old ladies , hard inlove withYonghwa ,workholic , always try her best to catch Yonghwa attention , Yonghwa partner in bussiness , hates Shin hye , beautiful but les attitude , fake , act kind-hearted , Jung family hates her , act nice and caring infront Jung family , well known as Miss Mushy Pushy by Yonghwa brother and sister)

SUPPORTING CAST

- Jung family (Mrs Jung , Mr Jung , Jung Eunji , Jung Soojung (as Krystal) and Jung Soyeon (as Jessica)

- Lee Hong Ki (22 years old , Shin hye , Seung ho and Shi yoon bestie)

- Yoon Shi Yoon ( 22 years old , Shin hye , Seung ho and Hong ki bestie)