WATCH: SISTAR19 reveals comeback video after 11-year hiatus

The wait is over: SISTAR19 is back!

The K-pop duo, consisting of Bora and Hyolyn, is drawing attention with their comeback trailer HYOLYN & BORA's VLOG │ GET READY WITH '19 which was posted on Klap Entertainment's YouTube channel on Sunday, Jan. 7.

This came after the beloved SISTAR subunit officially announced the date and details for their comeback last Wednesday, Jan. 3, after more than a decade. They are set to release their new digital single, No More (Ma Boy), and their B-side track, Saucy, on Tuesday, Jan. 16, which was unveiled through social media posts featuring the duo's concept photos and tracklist.

The video shows what life behind the scenes would look like for the girls—Hyolyn finds her center as she flows through a Pilates and yoga session, and Bora channels her inner pastry chef for a vlog.

Although the two are presently signed to different agencies, Klap Entertainment will be in charge of the management and production of the music project. The company also stated that Starship Entertainment, SISTAR's former agency, has fully supported the release.

"The two members – Hyolyn and Bora – are working hard on their vocals and choreography to upgrade the unit's identity," Klap Entertainment said as reported by Korean media outlet Korea JoongAng Daily.

The highly anticipated comeback project marks Hyolyn's first music following the release of her single, This Love, with Korean-Canadian singer Paul Blanco earlier this year. She also placed 4th last year on Mnet's competition series, Queendom 2, as the only soloist alongside five girl groups, where WJSN (Cosmic Girls) emerged as the winner.

Meanwhile, Bora was featured on fellow SISTAR member Soyou's single Aloha in July. She also starred in numerous TV shows, such as SBS' drama Dr. Romantic.

SISTAR19 debuted in 2011 with their smash hit, Ma Boy. The duo's previous release was their 2013 single Gone Not Around Any Longer.

Bora and Hyolyn were also part of the four-member act SISTAR, alongside Soyou and Dasom, which debuted in 2010 under Starship Entertainment. They were known as "K-pop Summer Queens" because of their vibrant, sexy, and refreshing summer-themed tracks throughout their career including Touch My Body (2014) and Shake It (2015).

The group disbanded in 2017 due to the expiration of its exclusive contract with the agency.