cignature (시그니처) is a seven-member girl group under J9 Entertainment. They debuted on February 4, 2020 with the digital single "Nun Nu Nan Na".
On January 22, the official debut schedule for their debut lead single A "Nun Nu Nan Na" was released. The group's promotional photos were released from January 27 to 28th, with the MV teaser being released on January 30 and the dance practice on 31st. On February 3, the official music video of their first digital single "Nun Nu Nan Na" was released. Lastly, the single was released on February 4th at 6PM KST on various music sites and their debut showcase, "Cignature Move", was held that same day.