MAMAMOO will release the special single ‘4WARD’ on June 4, 2026, at 6 p.m. KST, bringing Solar, Moonbyul, Wheein, and Hwasa back together for a full-group project. The MAMAMOO 4WARD release follows the group’s October 2022 album ‘MIC ON’ and is being presented as its first full-member activity in about three years and eight months.1
The comeback schedule was made public after MAMAMOO posted a scheduler image on its official social media channels on May 21, 2026. The rollout is set to begin with a mood teaser on May 23, followed by concept photos, a lyric spoiler, film photos, and a music video teaser before the single arrives.1
MAMAMOO 4WARD Single Release Details

The title ‘4WARD’ links the group’s four-member identity with the idea of moving forward. ChosunBiz, carrying an OSEN report, described the name as a combination of the number 4, representing the four members, and ‘FORWARD,’ meaning progress.2 Sports Seoul also reported that the scheduler included four empty chairs and the phrase ‘FOUR AS ONE. MOVING 4WARD,’ language presented as a sign of the four members coming together again and moving into a new chapter.3
The confirmed lineup for the single is Solar, Moonbyul, Wheein, and Hwasa. The reports frame the release not as a solo or unit project, but as a full-group return after the members had continued individual activities.4
A related RBW statement about the world tour title described ‘4WARD’ as a compound of the number 4, symbolizing the members, and ‘FORWARD,’ representing forward movement, saying it points to the new journey MAMAMOO will unfold.5
| Item | Confirmed detail |
|---|---|
| Release | Special single ‘4WARD’ |
| Artist lineup | Solar, Moonbyul, Wheein, Hwasa |
| Release date and time | June 4, 2026, at 6 p.m. KST |
| Scheduler posted | May 21, 2026, via official social media |
| First planned teaser | Mood teaser on May 23, 2026 |
| Prior full-group release noted in reports | ‘MIC ON’ in October 2022 |
Teaser Rollout and Full-Group Context
The scheduler places the single in a staged promotional sequence rather than a one-step announcement. After the May 23 mood teaser, the group is scheduled to reveal concept photos, a lyric spoiler, film photos, and a music video teaser in order.1 The source material does not provide a tracklist, songwriters, running time, physical album format, or music video release time beyond the general teaser plan.
Soompi reported earlier that MAMAMOO had released a first teaser for the full-group comeback at midnight KST on May 7, 2026, and later updated its coverage with the June 4 release date and 6 p.m. KST timing for the special single.6 That earlier teaser coverage places the May 21 scheduler within a broader buildup that began before the formal date announcement.
Several reports identify the gap since ‘MIC ON’ as about three years and eight months. Because the current date is May 22, 2026, the single has been announced but has not yet been released. The available reporting supports writing that ‘4WARD’ is scheduled for release on June 4, not that the single is already available.
Seoul Concerts to Follow the Single
The single is also connected to MAMAMOO’s 2026 world tour plans. After the music release, the group is scheduled to open ‘MAMAMOO 2026 WORLD TOUR [4WARD]’ with Seoul performances from June 19 to June 21, 2026, at Olympic Hall in Olympic Park.2 JoyNews24 also reported the same Seoul concert dates and venue in coverage of the full-group return.4
OSEN reported that tour-related concept photos were released through official channels on May 12, 2026. The tour itinerary listed in that report includes Seoul first, followed by cities including Kaohsiung, Macau, Singapore, Manila, New York, Chicago, Fort Worth, Cedar Park, Los Angeles, San Jose, Kent, and Hong Kong.5
The available source material does not include ticket prices, presale details, seat maps, or full venue information for all cities. It does, however, establish the Seoul opening run as part of the same full-group project surrounding ‘4WARD.’
Quick FAQ
When will MAMAMOO release ‘4WARD’?
MAMAMOO is scheduled to release the special single ‘4WARD’ on June 4, 2026, at 6 p.m. KST.1
What happens after the ‘4WARD’ single release?
After the single release, MAMAMOO is scheduled to begin ‘MAMAMOO 2026 WORLD TOUR [4WARD]’ with three Seoul concerts from June 19 to June 21, 2026, at Olympic Hall in Olympic Park.2 !MAMAMOO 4WARD June 4 release full group return concept MAMAMOO’s ‘4WARD’ schedule now gives the comeback a fixed release date, a staged teaser path, and an immediate concert follow-up in Seoul. The confirmed facts point to a coordinated full-group return centered on the June 4 special single and the world tour opening later in June.
References
- 마마무, 3년 8개월 만 완전체 컴백…6월 4일 '4WARD' 발매 (SBS연예뉴스, 2026-05-22)
- Mamamoo reunites for June 4 comeback with special single 4WARD (ChosunBiz / OSEN, 2026-05-22)
- 다시 뭉친 마마무, 3년 8개월 만에 ‘4WARD’ 발매 (스포츠서울, 2026-05-22)
- 마마무, 6월 4일 완전체 귀환…3년 8개월만 컴백(공식) (조이뉴스24, 2026-05-22)
- 마마무, 3년만 완전체 월드투어 컴백..솔라X문별 '강렬 카리스마' 장착 (OSEN, 2026-05-13)
- Update: MAMAMOO Announces Comeback Date With Scheduler For Special Single "4WARD" (Soompi, 2026-05-06)