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High school teacher Lam Yiu-Kwok (Jacky Cheung) is in the midst of a midlife crisis. His wife, Man-Ching (Anita Mui), has been unfaithful; his friends are reaping the rewards of successful business careers while he earns a comparatively meager salary at an unglamorous job; and one of his young students, Choy-Lam (Karena Lam), has fallen for him. When Man-Ching leaves for a month to help her former lover, a jealous Yiu-Kwok is tempted to retaliate by pursuing an affair with Choy-Lam. Wikipedia