Night Blues(1966)

Singers Han Sang-soo (Choi Moo-ryong) and Cha Yoo-mi (Lee Bin-hwa) are called "Wonang-sae duo" and enjoy the highest popularity. However, unlike Yumi, who loves Sang-soo deeply, Sang-soo considers her relationship with Yumi to be a friendship and marries her sister, Kyung-hee (Tae-reality), a pianist at the club. When Sang-soo marries Kyung-hee, Yumi, who is greatly hurt, leaves for France alone, and Sang-soo turns into a solo artist, but becomes a singer who travels to the countryside due to his lack of popularity and becomes a singer on stage.