Who is the best K-POP performer? Let's throw away all our titles and compete solely through our performances! Here are six K-POP boy groups: the group that ensures your entertainment "BtoB," the idol of the nation "iKON," one-of-a-kind perfect performing group "SF9," group with a strong performance, "THE BOYZ," rising on the global market, "Stray Kids," and a global hot rookie "ATEEZ," who are different in music style and even their debut years. They are gathered here to compete on stage and onl...