Synk: Aexis Line is the second special digital single album and third overall by South Korean girl group Aespa. It was released by SM Entertainment on November 17, 2025, and contains four tracks that were previously performed on their Synk: Aexis Line tour.
Background and release On June 10, 2025, Aespa officially announced their third world tour, Synk: Aexis Line, via X and Weverse, with the first stop scheduled in Seoul from August 29 to August 30, 2025.
During their first stop in Seoul, the members unveiled solo performances featuring new, unreleased tracks, with each member participating in writing their own song. On November 13, 2025, SM Entertainment announced that Aespa would release the solo songs performed during the tour on digital platforms on November 17, coinciding with their fifth anniversary. Another version of the single album, containing the two sub-unit songs performed by Aespa beginning with the Tokyo shows of Synk: Aexis line, was released on August 9, 2026.
Composition Synk: Aexis Line contains four tracks. The first track, "Blue", performed by Winter, is described as a pop-rock song distinguished by its gradually intensifying guitar sound. The lyrics express a determined resolve to keep moving forward despite feelings of helplessness, and complement her signature delicate vocal tone. The second track, "Ketchup and Lemonade", which is performed by Ningning, is described as an R&B track that pairs a subdued, languid sound with Ningning's emotive vocals. The lyrics portray the delicate inner conflict of wanting to forget a breakup yet being unable to let go.
The third track, "Tornado", performed by Giselle, is described as a tropical dance track that delivers a refreshing yet dreamy atmosphere. Its lyrics candidly express the emotional duality of wanting to stir both her own heart and the other person's "like a tornado." The last track, "Good Stuff", performed by Karina, is described as a hip-hop dance track characterized by its heavy sound and addictive hook. The lyrics project a confident and bold attitude, delivering an intense and empowering energy.
Track listing
Credits and personnel Credits adapted from the single's liner notes, provided from Melon.
Studio SM Wavelet Studio – recording SM Droplet Studio – recording, digital editing , engineered for mix Doobdoob Studio – recording , digital editing SM Yellow Tail Studio – recording SM Aube Studio – recording, engineered for mix , digital editing Vibe Music Studio 606 – recording SM Blue Ocean Studio – mixing SM Starlight Studio – mixing SM Big Shot Studio – mixing SM Blue Cup Studio – mixing Klang Studio – mixing in Dolby Atmos Sterling Sound – mastering
Personnel
SM Entertainment – executive producer Aespa Karina – vocals, lyrics, background vocals Giselle – vocals, lyrics, composition, background vocals Winter – vocals, lyrics, background vocals Ningning – vocals, lyrics, background vocals Jimmy Jansson – producer, lyrics, composition, arrangement, electric guitar, acoustic guitar, keyboard, synthesizer, drum programming Joowon – lyrics, vocal directing Kristin Carpenter – lyrics, composition, background vocals Hilda Stenmalm – lyrics, composition, background vocals Pink Slip – producer, lyrics, composition, arrangement Amelia Moore – lyrics, composition Inverness – producer, lyrics, composition, arrangement Mary Wietz – lyrics, composition Aidan Rodriguez – producer, lyrics, composition, arrangement Shintaro Yasuda – producer, lyrics, composition, arrangement, vocal directing, background vocals, digital editing Violet Skies – lyrics, composition Ruth-Anne Cunningham – lyrics, composition Imlay – producer, composition, arrangement, synthesizer, sound effects Jacob Manson – producer, composition, arrangement, drums, bass, keyboard Emily Yeonseo Kim – vocal directing , background vocals Saay – vocal directing Kim Seung-ho – drums Koo Bon-am – bass Kwon Han-eol – electric guitar Lee Hyun-young – keyboard Kang Eun-ji – recording Kim Joo-hyun – recording, digital editing , engineered for mix Eugene Kwon – recording Noh Min-ji – recording Kim Hyo-joon – recording, engineered for mix , digital editing Jeong Mo-yeon – recording Lee Kang-hyun – recording Jang Woo-young – digital editing Kim Cheol-sun – mixing Jeong Yoo-ra – mixing Lee Min-kyu – mixing Jung Eui-seok – mixing Koo Jong-pil – mixing in Dolby Atmos P.O.D. – mixing assistant in Dolby Atmos Chris Gehringer – mastering
Release history + Release history for Synk: Aexis Line Region Date Format Label Various November 17, 2025
Notes
References