How long is the movie Swing Kids?

Is Swing Kids Korean movie based on true story?

Swing Kids (Korean: 스윙키즈; RR: Seuwingkijeu) is a 2018 South Korean musical drama film directed by Kang Hyeong-cheol and based on the Korean musical Roh Ki-soo.

Swing Kids (2018 film)

Swing Kids
Screenplay by Kang Hyeong-cheol
Based on Rho Ki-soo (musical) by Jang Woo-sung
Produced by Lee An-na Yoo Sung-kweon