[1] On February 20, JO1 held their second online concert titled Starlight Deluxe in Paju as a part of the promotion of their first studio album The Star.

[6] Challenger consists of a total of six songs that were released into three different physical editions with "Born to Be Wild" served as the lead track.

[8] The music video was directed by Seo Dong-hyeok from South Korean production company Flipevil,[9] and released worldwide on March 24, 2021.

[10] The theme was said to be "challenge": opening the door boldly with fear and expectation, taking the first step, and overcoming with determination.

[15][16][17] "Born to Be Wild" was also used as the theme song for the nationwide TV commercial of Nike Air Max Infinity 2 by ABC-Mart.

[21] The single received a Platinum certification by the Recording Industry Association of Japan for more than 250,000 copies in shipments.

[24] Challenger also debuted atop of Billboard Japan Top Singles Sales,[25] and put JO1 at second place for the Artist 100, which was also their highest placement on the chart to date.