NMIXX is a South Korean girl groups formed by SQU4D, a sub-label of JYP Entertainment. Consisting of LILY, HAEWON, SULLYOON, BAE, JIWOO and KYUJIN, NMIXX debuted in February 2022 with the single AD MARE that featured the title track "O.O". The name NMIXX combines the letter "N", which stands for "now", "new", "next" and the unknown "n", and the word "mix", which symbolizes combination and diversity, altogether meaning "the best combination for a new era". NMIXX’s debut single AD MARE introduces a new genre called MIXX POP, packed with the confidence and ambition of a new group ready to take on the world. It blends in two or more genres into one flavorful song and represents the unusual experiment of NMIXX. “O.O” is a reinterpretation of baile funk and the track leads the listeners to the world of MIXX POP. After the start of promotions the MV of "O.O" surpassed 20 million views in the first 24 hours of its release. The song entered the Billboard Global Chart (excluding U.S.) at No. 71, and also ranked No. 138 on Billboard Global 200. Meanwhile AD MARE sold over 220K copies in the first week, recorded the highest debut album sales by a girl group ever in K-pop history.