Temptation of an Angel (1999)

TV commercial director Fei (Michael Chow Man-kin) is mourning the death of girlfriend Angel Chen (Yuk), and through flashbacks induced by his reading of her diary, we see how their relationship developed and, eventually, faltered when she met handsome gym instructor Roy (Ngai). Angel loves both men and her inability to break off with one or both of them leads to tragedy.