A duet is suggested to the person who wants a duet from the higher grade determined in the first round. If a duet is proposed by a higher grade than the participant himself, the participant with a lower grade cannot refuse it. The number of winning teams is indicated in bold. Participants in the winning team survive, and participants in the losing team become candidates for elimination.
Sequence
Team
Score
The Song
영상
1st Round
Park Jae Up, Choi Su Hwan
645
SHINee – Sherlock
Lee Dong Hoon, Sun Yul
624
Jonghyun – End of Day
2nd Round
Seunghoon, Neon
650
Crush – Hmm-cheat
Yoon In Hwan, Ma Jae Kyung
666
Roy Kim – Take Me Back in Time
3rd Round
Jay Chang, Bit Saeon
693
Chalie Puth – Dangerously
Wu Muti, Kang Ha Yoon
697
Harry Styles – Falling
4th Round
Kang Seok Hwa, Jeon Woong
505
BLACKPINK – Kick It
Ji Yeon Woo, Jeong Yoon Seo
591
Ryeo Wook – Little Prince
5th Round
Bain, Kim In Seo
690
Bishop Briggs – River
Kim Seong Jeon, Lee Gwang Seok
587
Beomjin – Hello
6th Round
Lee Gunu, Jeong Soo Min
636
Crush – Don’t forget Me
Kim Seo Hyung, Hong Seong Joon
601
Urban Jakapa – I don’t love you anymore
7th Round
Hong Seong Won, Tae Hwan
578
LUCY – Play
Lim Jun Hyeok, Yeo Won
579
IU – My Sea
8th Round
Choi Ha Ram, Hwang In Hyeok
648
Bolbbalgan4 – To My Youth
Park Joo Hee, Kwon Yi Bin
607
Stray – Moon
9th Round
Hyuk Jin, Jeong In Seong
543
Lee Hong Ki& Yu Hwi Seung- I Loved You
Jang In Tae, Lee Min Wook
589
EXO – Universe
10th Round
Lim Sang Hyun, Tae Woo
641
I.O.I – Downpour
Lee Hwan Hee, Jo Hwan Ji
515
Taeyeon – Four Seasons
2 VS 2 Rival Mission Losers
Kang Seok Hwa
Kim Seong Jeong
Hong Seung Joon
Tae Hwan
Hong Seong Won
Kwon Yi Bin
Jeong In Seong
Hyuk Jin
Jo Hwan Ji
Lee Hwan Hee
This was how Build Up 2nd Round worked, and the result of it.