Contract Lover (2007)

Fatt (Richie Ren) is from a family of martial arts experts, but he ends up being a businessman instead. He intends to introduce his girlfriend (Kate Tsui) to his father (Wah Yuen) but is skeptical if his father could accept her modern ways. Hence, Fatt resorts to hiring a temporary girlfriend to test out his father. Zao (Fan Bingbing) has just graduated from university and urgently needs money. She takes up the job and signs a contract with Fatt to be his temporary lover. Fatt brings his hired lover home to meet his father, only to expect the unexpected.