Red Velvet, the decision on the performance in North Korean . In Korea, "difficulty of selecting song" is a topic.

* Red Flavor: a symbol of "communist revolution" and "the Korean Workers Party". Considered taboo

* Russian Roulette: Associated with "purge"

* Bad Boy, Rookie: Associated with "Leader of Nuclear Development"

* Peek-A-Boo: Associated with "Raid of the Korean War"

* Dumb Dumb: Associated with "the reality of North Korea"