O3ohn - Bye
O3ohn - Don't Cry
O3ohn - Bicycle Kids1
O3ohn - Bicycle Kids2
O3ohn - Help
O3ohn - New Love
O3ohn - 바람, 어디에서 부는지 (Wind, from where are you blowing)
O3ohn - In Time (OST Seasons of Blossom)
O3ohn - Better Than Birthday (OST Extraordinary Attorney Woo Part.3)
O3ohn - 내 마음속 너의 강 (Your River In Me) (OST Link: Eat, Love, Kill Part.1)