Listen to 선을 지켜볼 의무 online. 선을 지켜볼 의무 is a Korean language song and is sung by Kim Jung Wan. 선을 지켜볼 의무, from the album 비밀의 숲 2 OST, was released in the year 2020. The duration of the song is 4:52. Download Korean songs online from JioSaavn.