Surprise U’s predebut activities
Webtoon Trainees OST (March 18, 2017)
Produce 101 Season 2
Produce 101: 나야 나 (Pick Me) Single (March 10, 2017)
Seongwoo was part of the trainees who recorded for 나야 나 (Pick Me).
Produce 101: 35 Boys 5 Concepts Single (June 3, 2017)
- Show Time (It’s)
- I Know You Know (Boys Under The Moon)
- 열어줘 (Open Up) (Knock)
- Oh Little Girl (Slate)
- Never (Nation’s Sons)
Seongwoo was part of Nation’s Sons and Never received an all-kill on Instiz, charting at #1 on real-time charts of Melon, Mnet, Bugs, Soribada and Naver.
Produce 101 – Final Single (June 17, 2017)
- Hands On Me
- Super Hot
- Always
Seongwoo performed Hands On Me and Always in the final episode.
Wanna One
1X1=1 (To Be One) (August 7, 2017)
- To Be One (Intro)
- 활활 (Burn It Up)
- 에너제틱 (Energetic)
- Wanna Be (My baby)
- 이 자리에 (Always) (Acoustic version)
- 나야 나 (Pick Me) (Physical Album Only)
- Never (Physical Album Only)
1-1=0 (Nothing Without You) (November 13, 2017)
- Nothing Without You (Intro)
- Beautiful
- 갖고 싶어 (Wanna)
- Twilight
- Burn It Up (Prequel Remix)
- Energetic (Prequel Remix)
- Wanna Be (My baby)
- Energetic
- Burn It Up
- To Be One (Outro)
- Wanna Be (My baby) (Premier Show-con Live ver.) (Physical Album Only)
0+1=1 (I Promise You) (March 19, 2018)
- Gold
- 약속해요 (I Promise You) (I.P.U.)
- 부메랑 (Boomerang)
- We Are
- 보여 (Day by Day)
- 너의 이름은 (I’ll Remember)
- 약속해요 (I Promise You) (고백 ver.)
1÷x=1 (Undivided) (June 4, 2018)
- 켜줘 (Light)
- 캥거루 (Kangaroo) (Prod. Zico) – Triple Position (Kang Daniel, Kim Jaehwan and Park Woojin)
- 영원+1 (Forever and a Day) (Prod. Nell) – Lean On Me (Hwang Minhyun, Yoon Jisung, and Ha Sungwoon)
- 모래시계 (Hourglass) (Prod. Heize) – The Heal (Ong Seongwu and Lee Daehwi)
- 11 (Prod. Dynamic Duo) – NO.1 (Park Jihoon, Bae Jinyoung and Lai Guanlin)
1¹¹=1 (Power of Destiny) (November 19, 2018)
- Destiny (Intro)
- 봄바람 (Spring Breeze)
- 집 (One’s Place)
- 불꽃놀이 (Flowerbomb)
- 묻고싶다 (One Love)
- Deeper
- 술래 (Hide & Seek)
- Awake!
- 12번재 별 (The 12th Star) (CD only)
- 소나무 (Pine Tree)
- Beautiful (Part II)