Bad Boy (2010)

Geon-Ok is a young man with a tragic past who has come back to take revenge on the people who robbed him from his life and identity as a child. Young Mo-Ne soon develops a big crush on him, and although her older sister, Hong Tae-Ra, is suspicious of the stranger who suddenly seems to be everywhere around her family at first,she cannot stay away from him for long either. Meanwhile, Moon Jae-In's goal is to get married to boss' son, Hong Tae-Sung. Due to some misunderstanding she believes Geon-Ok to be the rich heir at first, but when she finds out the truth, she is somehow still intrigued by this mysterious stranger who never says anything about himself and only responds to questions with other questions.