'Weekly Idol's August 24 guests made even the 'Universe's Biggest Star' Heechul shake in his boots. 

These guests, who made Heechul so nervous, were none other than the boys of NCT 127, a sub-unit of SM's newest boy group NCT! 

Heechul, turning to the other MCs for reassurance, asked them, "Do I seem different today? It's the first time that an SM junior artist is guesting on 'Weekly Idol' after I started MC-ing. So I'm really nervous. I'm worried. Why does their first variety have to be this show?" 

SEE ALSO: Highlight reclaims their name and releases music as BEAST (B2ST) after 9 years

NCT 127, being the generous junior artists they are, tried their best to dissipate Heechul's worries. Taeyong said, "We chose 'Weekly Idol' as our first variety because of Heechul. We guested on the show because we trust him. Heechul is someone who is very considerate of the junior artists."