M Countdown EP.923 Preview: Two Debuts, Five Comebacks, and HWASA on Release Day

M Countdown Episode 923, airing on Mnet on Thursday, April 9 at 6PM KST, arrives with one of the most densely loaded lineups of the spring season. As previewed by Kep1er on Mnet K-POP's official YouTube channel, the episode features two hot debut broadcast stages, five acts returning with new music, and HWASA dropping her latest single on the same day as the broadcast. There is a lot happening at once.

The show is available for international fans through Mnet's Tving streaming platform, which has carried M Countdown's global broadcast since its expansion last year. The April 9 episode follows last week's broadcast, which gave BTS their sixth consecutive win for "SWIM" — a significant benchmark as the group's ARIRANG promotional cycle continues.

Two Hot Debuts: hrtz.wav and KEYVITUP Take Their First Broadcast Stage

The most significant news for new artist watchers is the back-to-back debut broadcast stages for two groups that both released their first music on April 8.

hrtz.wav — stylized as "하츠웨이브" in Korean — is a five-member global boy band formed through Mnet's survival program "Steal Heart Club" under Kakao Entertainment and CJ ENM. Members Youn Youngjun, Riaan, Dane, Keiten, and hagiwa were announced as the winners on December 23, 2025, and spent the following months preparing their debut package. Their first mini album "The First Wave" and its title track "Nineteen" dropped April 8, making this M Countdown stage their first live broadcast performance as a group. The survival show format that produced hrtz.wav tends to generate committed fandoms from the start, meaning this debut arrives with an audience already in place.

KEYVITUP, a five-member group under iNKODE Entertainment — the label founded by JYJ's Kim Jaejoong — makes their own debut broadcast appearance on the same episode. The lineup of Hyunmin, Taehwan, Sena, Jaein, and Rukia, which includes both Korean and Japanese members, released their self-titled first EP on April 8, following a pre-release single "BEST ONE" that dropped March 26. The group name is derived from the words "KEY," "VITAL," and "UP." Both debuts on the same episode is unusual, and the contrast in their backgrounds — competition-show formation versus label debut — makes for an interesting dynamic in how each group enters the scene.

Comebacks: KISS OF LIFE, HWASA, AMPERS&ONE, DAYOUNG, and IRENE

KISS OF LIFE made their long-awaited return on April 6 with the single "Who Is She," their first release after approximately ten months. The group held a showcase at Blue Square Woori WON Banking Hall in Hannam-dong, Seoul, ahead of the M Countdown stage. Known for their old-school R&B and funk-influenced style, KISS OF LIFE has built a devoted audience that has been actively anticipating new material since mid-2025.

Also on April 6, KickFlip released their fourth mini album "My First Kick," with the title track "I Want to Be Intrusive" — a hyper funk-based dance song that represents a sharp tonal shift from their previous work. The group was among the additional lineups announced for KCON JAPAN 2026 earlier this year, reflecting their growing international presence.

HWASA's comeback is the most time-sensitive moment on the April 9 lineup. Her new digital single "So Cute," released through P NATION, drops the same evening as the M Countdown broadcast — meaning fans watching the live show will be hearing the song performed publicly for the first time within hours of its release. Following her previous single "Good Goodbye" in October 2025, "So Cute" takes a melodic dance-pop direction. The real-time alignment of release and broadcast stage is unusual and is likely to generate significant social engagement.

DAYOUNG, a member of WJSN under Starship Entertainment, continues her solo career with "What's a Girl to Do," released April 7. The song follows her 2025 solo debut "Body" and carries a lo-fi, late-night aesthetic. DAYOUNG participated in writing and composing both tracks on the single, reinforcing her creative involvement in the solo project.

IRENE rounds out the comeback section with her first full-length solo album "Biggest Fan," released March 30, 2026. The ten-track album is her most expansive solo release to date, and her M Countdown stage continues the promotion cycle for the title track — a bright pop dance song about positive energy and her connection with fans.

AMPERS&ONE's "GOD" and Their World Tour Announcement

The seven-member FNC Entertainment boy group AMPERS&ONE released their fourth mini album "DEFINITION" on April 8, with title track "GOD" — a trap-beat dance song with ethnic synth textures and an emotional undertone. The M Countdown performance is part of their active comeback promotion. The group has also announced a 2026 world tour titled "Born To Define," beginning in Seoul on May 2, reflecting a significant expansion in their live schedule following the release.

And Kep1er, who appear in the teaser as the episode's lineup guides, are in their own comeback cycle. The group — now performing as a six-member reconfigured lineup — returned on April 2 with their eighth mini album "CRACK CODE" and lead single "KILLA." Their M Countdown stage on April 9 is a follow-up performance from that release.

M Countdown Episode 923 airs Thursday, April 9 at 6PM KST on Mnet. International streaming is available on Tving. With two debut groups taking their first broadcast stages and HWASA dropping music in real time, the episode stands out as a meaningful marker for where K-pop's spring season is currently landing.