In July 2015, Antenna Music announced that Kwon's debut album was nearing completion, with an expected release date in September 2015.

[5] On July 18, 2016, she released the duet single "For Now" with fellow Antenna signee and K-pop Star 3 finalist Sam Kim.

[6] The pair promoted as a duo, opening for Charlie Puth's concert in Seoul the following month and performing together at the Asia Song Festival in October.

[14] In February 2023, the agency announced that Kwon will make a comeback with EP "The Flag" which is scheduled to be released on March 2,[15] and will also hold solo concerts on April 1 and 2.

[21] In November 1, Hyundai Korea released a song walled "Wish" featuring Kwon Jinah, Kyuhyun and Sam Kim.

[25] In March 15-17, Kwon held her largest solo concert called "Floriography" at SK Olympic Handball Stadium.

[27] Kwon also joined her fellow agency artists for an Antenna and Samsung Collaboration of a Gift Funding Song.