Gaon Album Chart and sold 122,202 copies in South Korea as of April 2021. The titular amassed 10 million views within the second week of its release on YouTube. In conjunction of it, Kang held his first-ever solo concert titled "Passage" on November 21, 2021. The event were simultaneously held in-person at Olympic Hall in Seoul and online as an integral of "YG Palm Stage 2021" while adhering COVID-19 guidelines and limits. On March 14, 2022, he released his fourth digital single "Born to Love You" and its music video. Since King of Mask Singer, KBS2 singing competition program, Immortal Songs: Singing the Legend, had sought for Kang to appear on the show; however, he declined their invitations due to his unavailability, until he was requested to compete on the "Lee Juck Special" to which he accepted with Lee personally scouting its participants. Kang performed "Rain" by Lee Juck in its latter half and was crowned the winner against veteran artists Forte di Quattro, Kwak Jin-eon, Choi Jung-in, and Jung Dong-ha. His title as the winner earned him the privilege to compete in the show's "King of Kings Special" and performed "Around 30" (서른 즈음에; seoleun jeueum-e) by Kim Kwang-seok, while competing with a flu against singers Lee Eun-mi and Seodo Band, Lee Young-hyun and Park Min-hye of Big Mama, La Poem and Forestella in its second part of the special. It recorded a rating of 7.7% nationwide and 8.0% in the metropolitan area in July 2022 — ranking first among all entertainment programs on Saturdays and it's time slot. Personal life On June 2, 2019, while he carried out promotions with his band for the lead single, "Ah Yeah" (아예; aye), Kang experienced symptoms of a spinal disc herniation while stand-by for rehearsals at Inkigayo. He was transported to the emergency room in a nearby hospital for examination and received treatment for the said diagnosis. He was discharged three days later after completing his treatment and was instructed to rest; however, Kang chose to carry out scheduled activities to minimize any burden inflicted on his band in result of his absence. Artistry Musicality and songwriting Kang has since been a registered associate member of the Korea Music Copyright Association and was one of twenty-five with band-mate Mino, to be promoted to the status of "full member" in January 2021. The requirements for the promotion include to maintain an associate