A Melody to Remember (2016)

Second Lieutenant Han Sang-Yeok (Si Wan) leads his platoon during the Korean War in the early 1950s. During the war, Sang-yeok encounters a children's choir who have lost everything due to the war. Emphasising with their plight, he tries to protect the children.

A Melody to Remember is a drama movie featuring Yim Si-wan.

A Melody to Remember is currently streaming for free (ad-supported) on Freevee, Plex, Plex Player, The Roku Channel and Tubi TV and it's also available on Rakuten Viki.