JYP announced on its official SNS channel on November 29th, "The 6-member rookie band X-dinary Heroes will officially debut on December 6, 2021 after releasing its first digital single Happy Death Day." As part of his debut project, he released a concept photo starring a bassist on November 29th, and on the 30th, he opened his personal image of the keyboardist O.de twice at 0:06 and 12:06.

O.de in the first concept teaser showed an unconventional visual with dark eye makeup and mint hair color. He perfectly pulled off metal items, bold earrings, and rings under his eyebrows, shining the possibility of a "next fashionista." In the second image, he showed off his unexpected beauty in a cozy space with a basketball and table soccer game console.