Wanna One
Wanna One at their show-con on August 7 Twitter

All roads led to the Gocheok Sky Dome on Aug. 7 as Korean boy band Wanna One officially made their debut.

The TV-produced K-pop group released their debut album "To Be One" and performed before 20,000 fans in a showcase and concert at the venue on Monday

The album is a culmination of almost two months of preparation since the 11 members of the group were named winners on the Korean TV show "Produce 101" in June.

Before the boys stood on stage, they met the media where they talked about their debut.

"We can't believe that we are finally making it," they said, according to the Korea Herald.

Ha Sung-woon said he only went to the Gocheok Sky Dome to watch a concert in the past but now, he's the one performing in it.

"I visited this Gocheok Sky Dome to see BTS' concert in the past. At that time, I thought, 'When would I be able to perform at this place?'" he said.

Kang Daniel, who won first place in the final episode of the TV show, added, "I've only dreamed about it when studying BTS and EXO's concert videos, but I never knew that we would be performing here at Gocheok Sky Dome one day."

"We'd like to dance and sing to our best to offer you joyful memories here," Hwang Min-hyun, who is also a member of boy band NU'EST, added.

In just 12 hours after the album was released at 6PM Korea time on Aug. 7, the title track "Energetic" became the No. 1 song on Korea's music charts including Melon, Naver and Mnet, proving the boys' extreme popularity. "To Be One" sold 140,000 copies on the first day.

According to Korean media, the album also placed at No. 1 on iTunes in 11 countries.