Mei has never been anyone's exclusive girlfriend in all her life. Every time she falls in love with a man, she ends up being a homewrecker in his relationship. Mei works in the customer service department and is involved in a relationship with Thiu, a married colleague. Due to Thiu's marital status, Thiu agrees to give 12 hours during the daytime to Mei and the other 12 hours to his wife. Mei is unhappy with the agreement but cannot get herself to leave Thiu because of love.