Copied it from comment ( Holy Verde)  : 

Jungwook: dabit1205
Hyungjun: daenyeol
Minseong: ixxhme
Yonghee: kimyh0423_
Seonwoo: shun.nuu
Junseong: 9506l6
Sungho: ffujvrygftu
Hyeongjin: __hyeong_

Contestants informations & IG accounts;

• Kim Jeong-wook, Singer-Songwriter (33y)
https://www.instagram.com/dabit1205/

• Yoo Seon-woo, Gelato Owner (32y)
https://www.instagram.com/shun.nuu/

• Jang Hyung-jun, Bar Owner, DJ, YouTuber (30y)
https://www.instagram.com/daenyeol/

• Lee Jun-sung, Employee at Clothing Dept. Store (27y)
https://www.instagram.com/9505l6/

• Hyeong-jin, Hairstylist (26y)
https://www.instagram.com/__hyeong_/

• Oh Min-sung, Chief Consultant of the Plastic Surgery Dept. (24y)
https://www.instagram.com/ixxhme/

• Shin Sung-ho, Make-Up Artist (24y)
https://www.instagram.com/ffujvrygftu/

• Kim Yong-hee, College Student (21y)
https://www.instagram.com/kimyh0423_/