As a soloist, he goes by the name Soo. He made his solo debut on December 22, 2017, with his first album Sweet Lie.
- Sweet Lie (2017)
- "Goodbye" (2018)
- Green Mango - "사랑은 원래 다" (2018)
- His fans are known as "Snakes" due to his roll in "Bingo" MV
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