A Melody to Remember
오빠생각 (original)
A Second Lieutenant fighting in the Korean War discovers a group of orphans whom he forms a choir with to protect them from further devastation.
Starring Yim Si-wan, Ko Asung, Ko A-sung, Lee Hee-jun, Lee Joon-hyuk, Lee Jun-hyeok, Jeong Joon-won, Kim Hyun-bin, Lee Re, Park Ji-yeon
Watch "A Melody to Remember" on Amazon released in 2016. It's a drama and war movie, and has a rating of 7.1 out of 10 from Imdb which is usually fine for this kind of movie, and is currently only available for purchase or rent.