tvN《阿拉姆恩之剑》公开了展现李准基和申世京深情，更加完美的新一首OST。 第三首OST《Untold》是一首融合了抒情钢琴演奏和弦乐器的旋律的民族风流行歌曲，表达了在激烈的宿命战争中两个恋人对彼此的思念。另外,由新锐歌手박선예（Park Sun Yae）担任演唱，以神秘美丽的音色使剧中深情倍增。 박선예（Park Sun Yae）用她具有强烈感染力，独一无二的音色把《阿拉姆恩之剑》引人入胜的叙事以特有的情感完整地描绘出来。 [Credits] Lyrics by Kapoo, Sean Kimm Composed by M2U, Kapoo, Sean Kimm Arranged by M2U, Kapoo, Sean Kimm All MIDI Programming by M2U & Kapoo Guitars by 윤태근 Chorus by 박선예, 박수정 Recorded by 온성윤 @ CS MUSIC& Studios Digital Editing by Sean Kimm, 허찬구 @ KNOB SOUND Mixed by 허찬구 @ KNOB SOUND Mastered by 성지훈, 류경민 @ JFS Studio Mastering OST Producer 김정하, 이주미, 임가원