I can't believe RD1's Yokohama fan concert is completely sold out. Are they really rookies?

I heard the news that all three fan concerts in Yokohama, Japan sold out. That's really amazing.

It's amazing that they gathered as many as 25,000 people even before their official debut in Japan.

Decorating the stage with a road trip concept was a nice touch, and hearing that they even performed an unreleased song, the fans must have really loved it.