Truth of Tomorrow(1975)

Original title: 내일은 진실

With the result of the brain operation, Kyu-Ae has the lower half of her body paralyzed and lives on a wheelchair with her husband Hyeong-Jin, a professor, and her cousin Kyu-Hee who takes care of housework. As Mi-Ran, who loved Hyeong-Jin before and now is divorced her husband, returns from America, the love between Hyeong-Jin and Kyu-Ae breaks. When Kyu-Ae knows Kyu-Hee loves Hyeong-Jin, she becomes almost mad. Kyu-Hee decides to marry a factory worker Young-Kil to keep Kyu-Ae and Hyeong-Jin's relationship good. But Kyu-Ae asks him a divorce, asking him to marry Kyu-Hee. After he decides to divorce, Kyu-Ae kills herself. As the result, Kyu-Hee leaves him.