Group NASTY NASTY fixed the choreography that was criticized for being too sexual.

Their song, "Knock" was rated ineligible for choreography by "Inkigayo" and "Show! Music Core."

NASTY NASTY's agency said the "problematic" choreography was modified twice. They said they were a bit disappointed, because the choreography was made to fit the song perfectly, but they will do their best to show a more perfected performance.

Besides SBS and MBC, NASTY NASTY will perform with their unaltered choreography on other networks.

NASTY NASTY is a unit group of Nine Muses Kyungri, ZE:A Kevin, and Sojin.