NMIXX impressed the viewers with their rendition of Stray Kids' "Thunderous" at the 'KCON 2022 Premiere' in Seoul. 

On May 7th, the first day of the 'KCON 2022 Premiere' took place in Seoul. An official precursor to the full return of 'KCON' in 2022, the 'KCON 2022 Premiere' event will take place across three major cities: Seoul from May 7-8, Tokyo from May 14-15, and Chicago from May 20-21. Afterward, 'KCON 2022' is slated to return to Los Angeles, California later this year from August 19-21, and again in Tokyo sometime in October.

During the concert on May 7th, NMIXX showed off their vocal and dancing skills covering Stray Kids' "Thunderous" live. 

 Shortly after the show, the viewers shared their reviews on a popular online community commenting: "Wow, they are covering a song dancing and singing live. This is amazing."

"Kyujin is crazy good..."

"I can't believe they are singing live with that much intense choreography."

"This group is the real deal."

"I love when a rookie group gives all in performances."

"I can't believe they are rookies. They are so good." 

"Babies born in 05 and 06 are killing it"

"I think they are the most talented among the rookies."

"This song is hard and I'm surprised they did it so well."

"I always watch NMIXX singing live"

"I hope they come up with a better song next time that could really show off their charms and skills."