The Pursuit of Happiness.

Just when everything seemed to go well for Ji An-Lei, a series of unfortunate events happens. Her promotion gets stolen by an outside hire, her boyfriend cheats on her, and she gets an unwanted roommate. When she discovers her new roommate had come all the way from Japan to win the love of his dream girl, who happens to be her boss' daughter and her ex's new girlfriend, she joins forces with him on an "Operation Fighting for Love."