Ruler: Master Of The Mask OST

1. Yang Yoseob - The Man Who Couldn't Cry

2. Bolppalgan Puberty - From The First Time You and Me 

3. Hwang Chi Yeol - Even a Little While ♥

4. Kei - Star And Sun

5. Kim Yun Ji - Between Seasons

6. Kim Na Young - I'm OK

7. Yang Yoseob - Tree

8. K.Will - The Person I Loved

9. Hwan Hee - Twinkle

10. Seo Young Eun - Flowing Down My Cheeks

11. Gavy NJ - Heartful of Love 

 12. Zia - Even If I Want

13. Kim Greem - The Only Person

14. L - It's Okay Even If It's Not Me

15. Suran - Water Orchid

16. Kim So Hyun - Can't Hear My Heart?

17. Yoo Sung Eun - Hidden Tears

18. Heo Young Saeng - Looking