Goodbye, My Once and Forever

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A wealthy heiress begins a relationship with a man in college and makes a five-year bet with her parents. She never expects betrayal. Yet, in the fifth year, her husband brings home his assistant. While she is asleep, his assistant gives their son a glass of wine. Furious, she demands accountability, but her husband defends his assistant, telling her not to overreact. Torn and heartbroken, she decides to file for divorce. (Source: dramaboxapp.com)