I Am Lady Number 77 (1978)

Due to her father's debts, Yun Go-na marries Song Kye-nam but she is unhappy because of Kye-nam's self-indulgent lifestyle. Go-na takes her daughter, Min-hi, and goes to Seoul where she gets a job as a hostess. One day, Mun Byung-kil proposes to Go-na. Troubled by her situation, Go-na turns him down. But Go-na is touched by his sincerity and marries him. The three live happily as a family but then Kye-nam shows up and demands his daughter Min-hi. However, Ky0e-nam goes away when he realizes which is real happiness of his daughter.