The Dreaming Man.

A romantic comedy following a kind young girl and the story that ignites because of a diamond ring. Wang Xiao He was orphaned since a very young age, and she has found a job in the city in order to earn money for college. She also harbors a crush on Zheng Tian Le. One day, she witnesses Tian Le being knocked unconscious by delinquents. She takes him to the hospital and gets mistaken for his fiancee because of a ring. She decides to go along with the story in order to stay by Tian Le's side, inviting the suspicions of Tian Le's brother Tian Chou.