back number's new single "HAPPY BIRTHDAY" will be released on February 27. 

The title track is the theme song for TBS' drama 'Hajimete Koi wo Shita Hi ni Yomu Hanashi', which began on January 15. Besides this, the single will include "Exhibition Death Match" and "Justice in the Box" as the coupling tracks. The Limited Edition will come with a DVD containing the PV for "HAPPY BIRTHDAY" and a digest of their Tokyo Dome concert from their live tour 'back number dome tour 2018 stay with you supported by uP!!!' which was held last summer.  

[Regular Edition]

[Track List]

CD:

01. HAPPY BIRTHDAY?
02. Exhibition Death Match
03. Justice in the Box
04. HAPPY BIRTHDAY?instrumental??
05. Exhibition Death Match?instrumental?
06. Justice in the Box?instrumental?

DVD:

??HAPPY BIRTHDAY?music video?making of studio recording & music video & photo session
??back number dome tour2018 "stay with you"?digest movie