Release date - 2025-05-26
 
“HAPPY BURSTDAY  blends the words ‘birthday’ and ‘burst’ to express the explosive energy of SEVENTEEN’s rebirth, capturing their desire to reinvent themselves as a ‘new SEVENTEEN’ and embrace a fearless new era beyond a decade.” The release date next month coincides with the 10th anniversary of SEVENTEEN’s 2015 debut as a group.
 
Pre-order purchasers only, 25 May 2025 - 1 unreleased selfie photocard (1 random out of 12) and 1 logo photocard pouch (1 random out of 3).
 
Total 3 versions
(NEW ESCAPE Ver. / NEW MYSELF Ver. / NEW BURSTDAY Ver.)
 
[NEW ESCAPE Ver.]
- Outbox: 1 type 
- Component box: 1 type
- Removable sticker: 2 types
- Folding piece cake: 2 types 
- Tear-off poster: 1 out of 12 types randomly inserted
- Poster: 1 type 
- Lyrics: 1 type 
- Photobook: 1 type / 48p
-CD envelope: 1 type 
-CD-R: 1 type
-Film: 3 types 
-Postcard: 1 out of 2 types, randomly inserted 
-Photocard: 4 out of 48 types, randomly inserted
 
[NEW MYSELF Ver.]
-Outbox: 1 type 
-Component box: 1 type 
-Puzzle: 1 out of 12 types, randomly inserted / 9 pieces *Limited to the first time
-Removable sticker: 2 types 
- Scratch Card: 2 out of 12 types randomly inserted 
- Photobook: 1 type / 84p
- Lyrics: 1 type 
- Poster: 1 type 
- CD Envelope: 1 type
- CD-R: 1 type
- Photocard: 4 out of 48 types randomly inserted 
 
[NEW BURSTDAY Ver.]
- Outbox: 1 type
- Component Box: 1 type
-Puzzle: 1 out of 12 types, randomly inserted / 9 pieces *Limited to the first time
-Invitation set: 1 type 
-ID card: 1 out of 12 types, randomly inserted 
-Photobook: 1 type / 84p
-Lyrics: 1 type 
-Poster: 1 type
-CD envelope: 1 type 
-CD-R: 1 type
-Photocard: 4 out of 48 types, randomly inserted