This concert was taking place at "Hoam Art Hall" in Seoul, South Korea.
From Yiruma's CD, "From the Yellow Room." Track number seven. "Sometimes... Someone."
Sheet Music: https://henwillp.wordpress.com/2016/02/01/yiruma-sometimes-someone-piano-sheet/ Tutorial: https://www.youtube.com/watch?v=OIBBZrSK4v8.
Yiruma, a popular Korean pianist and composer released the album [The Best - Reminiscent 10th Anniversary] to commemorate his 10th Anniversary.