ATEEZ has added a new BAD BOOK teaser to its comeback rollout, posting the update through the group’s official X account on May 27, 2026. The ATEEZ Bad Book post invited fans to write about friends who are talented, gorgeous, or lovable, named London for May 29, and left another stop or step marked only as “Next – ??” 1
The teaser arrives during the buildup to GOLDEN HOUR : Part.5, which is scheduled for release on June 26, 2026 at 1 p.m. KST. KQ Entertainment has also opened U.S.-only pre-orders for ATEEZ’s GOLDEN HOUR : Part.5 ‘BAD Single CD,’ with the pre-order period running from May 27 at 10 a.m. KST through June 25. 2
ATEEZ Bad Book Teaser Details

The May 27 post presented BAD BOOK as a participation-focused prompt rather than a full product or event announcement. ATEEZ’s official X account wrote, “Write it in the BAD BOOK and expose your friends for being ridiculously talented, gorgeous, or lovable.” 1
The same official update listed London for May 29 and included the unresolved line “Next – ??” 1 The provided source material does not confirm a venue, event time, entry process, participation rules, or any later location connected to the teaser.
Koreaboo reported on May 28 that the BAD BOOK visual teaser drew attention because text in the image read “Someone’s married.” The report also noted that the official caption referred to London on May 29, while fan attention centered on the wording inside the teaser image. 3
No source material confirms that “Someone’s married” refers to an actual marriage, a member’s personal life, a plot clue, or a promotional joke. Based on the available information, the confirmed facts are limited to the official BAD BOOK wording, the London date, the open-ended “Next – ??” line, and the broader comeback schedule.
Confirmed Dates and Release Information
| Item | Confirmed detail | Source |
|---|---|---|
| BAD BOOK teaser post | May 27, 2026 | ATEEZ official X 1 |
| Mentioned location/date | London, May 29 | ATEEZ official X 1 |
| U.S.-only pre-order opening | May 27, 2026 at 10 a.m. KST | KQ Entertainment 2 |
| U.S.-only pre-order deadline | June 25, 2026 | KQ Entertainment 2 |
| GOLDEN HOUR : Part.5 release | June 26, 2026 at 1 p.m. KST | Soompi 4 |
KQ Entertainment’s notice identifies the U.S.-only product as GOLDEN HOUR : Part.5 ‘BAD Single CD’ and lists June 26, 2026 as the release date. 2 The preorder information links the BAD wording to the wider GOLDEN HOUR : Part.5 campaign, but it does not define BAD BOOK itself.
Other entertainment reports have also connected the comeback rollout with the word “Bad.” Korea JoongAng Daily reported that KQ Entertainment announced ATEEZ would release GOLDEN HOUR: Part 5 on June 26, and said an official YouTube teaser ended with the word “Bad” and the EP’s release date. 5 OSEN, carried by ChosunBiz, described the project as ATEEZ’s 14th mini album and reported that the spoiler video displayed “BAD” along with “2026.06.26 1PM KST.” 6
Soompi reported that ATEEZ revealed a promotion map for GOLDEN HOUR : Part.5 after first unveiling a teaser video for the album. The release is scheduled for June 26, 2026 at 1 p.m. KST. 4
What Is Still Unconfirmed
The BAD BOOK teaser confirms a phrase, a prompt, and a London date, but it does not explain the full format of the activity in the available source material. It remains unconfirmed whether BAD BOOK is a fan event, a social media campaign, a physical installation, a concept element, or a combination of those formats.
The “Next – ??” wording also remains unresolved. The phrase indicates that another step may follow, but the provided sources do not identify a city, schedule, venue, or date for that entry.
The “Someone’s married” text reported from the teaser image has become part of the discussion around the post, but the source material does not support treating it as a factual marriage announcement. In a news context, the wording can only be described as text shown in or reported from the teaser image.
Quick FAQ
What is ATEEZ Bad Book?
Based on the official May 27 post, BAD BOOK is a teaser or promotional prompt asking fans to write about talented, gorgeous, or lovable friends. The provided sources do not confirm its full format. 1
When is GOLDEN HOUR : Part.5 scheduled for release?
GOLDEN HOUR : Part.5 is scheduled for release on June 26, 2026 at 1 p.m. KST, with KQ Entertainment also listing June 26 for the GOLDEN HOUR : Part.5 ‘BAD Single CD.’ 2 4 !에이티즈 배드북 티저 London event GOLDEN HOUR Part.5 release concept For now, the BAD BOOK teaser is a confirmed May 27 ATEEZ update with a London mention for May 29 and a still-undisclosed next step. Its clearest connection is to the ongoing GOLDEN HOUR : Part.5 rollout, which remains scheduled for June 26, 2026 at 1 p.m. KST.
References
- ATEEZ official X 'BAD BOOK' event teaser (ATEEZ official X, 2026-05-27)
- ATEEZ GOLDEN HOUR : Part.5 ‘BAD Single CD’ (US ONLY) Pre-order Information (KQ Entertainment, 2026-05-27)
- Married? Popular 4th Gen K-Pop Group Drops Clues (Koreaboo, 2026-05-28)
- Update: ATEEZ Reveals Promotion Map For June Comeback With "GOLDEN HOUR : Part.5" (Soompi, 2026-05-21)
- Ateez to release new EP 'Golden Hour: Part 5' on June 26 (Korea JoongAng Daily, 2026-05-22)
- 에이티즈, 6월 26일 컴백 확정…의미심장 'BAD' (ChosunBiz / OSEN, 2026-05-22)