[+ +] (plus plus[1], Hangul: 플러스 플러스) is the debut mini-album of South Korean girl group LOOΠΔ. It was released on August 20, 2018. It contains 6 tracks including the lead single “favOriTe” and the title track “Hi High”, with the music video releasing the same day. It was later re-released as [X X] with six new tracks.

The album comes in 4 versions, a Digital A and B version along with Limited A and B versions.


[+ +] represents the “plus plus” effect LOOΠΔ 1/3, ODD EYE CIRCLE, yyxy, and YeoJin gather to create. LOOΠΔ was born in its own universe with three uniquely structured teams. In other words, it was not designed as a group diving up into three units, but three teams were built to create one universe.[2]

[+ +]는 이달의 소녀 1/3, ODD EYE CIRCLE, yyxy 그리고 여진이 모여 플러스 플러스의 효과를 발휘한다는 의미를 지녔다. 처음부터 이달의 소녀는 한 세계관 안에 세 개의 독자적인 팀 구조를 가지고 탄생했다. 즉, 하나의 팀이 세 개의 유닛으로 쪼개지는 것이 아니라, 세 개의 팀이 하나의 세계를 만드는 구조이다.[2]


  1. + +” – 00:58
  2. Hi High” – 3:16
  3. favOriTe” – 3:14
  4. Heat (열기)” – 3:30
  5. Perfect Love” – 3:34
  6. Stylish” – 3:29

Background and Release[]

On July 31, 2018 LOONA released a teaser for their first group single, and 1st title track "favOriTe". It announced the release date to be Aug 7, including the text "Just stay where you are, I’ll be there." Later on Aug 2, a teaser for the music video was released as well.[3] The music video was released on Aug 7, as expected.[4]

Two days later the first promotional picture for Go Won was released, with the last being revealed on the 14th of Kim Lip. On Aug 16, the tracklist was revealed, also revealing the title track to be "Hi High".[5] The full album, along with their music video for "Hi High" was released on Aug 20 as well.[6]


Same day of release, they held their debut showcase as well.[7] They made their debut stage as well on M! Countdown.[8]



Behind the Scenes[]

Album Covers[]


Normal Version[]

Version A
Version B

Limited Version[]

Version A
Version B








Songs Writers
Lyrics Composers Arrangers

+ +

- NOPARI (MonoTree)
Hwang Hyun (MonoTree)
GDLO (MonoTree)
Artronic Waves
Billie Jean (BADD)
Slyberry (BADD)
Hwang Hyun (MonoTree)
Hi High Jaden Jeong
Hwang Hyun (MonoTree)
GDLO (MonoTree)
Hwang Hyun (MonoTree)
GDLO (MonoTree)
Mayu Wakisaka
Hwang Hyun (MonoTree)
GDLO (MonoTree)
favOriTe Jaden Jeong
Kim Sujung
Slyberry (BADD)
Billie Jean (BADD)
Kim Jin-hyeong (BADD)
Sophia Pae
Slyberry (BADD)
Billie Jean (BADD)
Kim Jin-hyeong (BADD)
Heat (열기) Seo Jung Ah Brooke Toia
Daniel Caesar (Caesar & Loui)
Ludwig Lindell (Caesar & Loui)
Adelén Steen
Perfect Love Le'mon (Joombas) Yoon Jong Sung (MonoTree)
Le'mon (Joombas)
Yoon Jong Sung (MonoTree)
Stylish Iggy (OREO)
Lambo (OREO)
Mike Macdermid
Emma O'Gorman
Marc Lian / Fulses
David Brant / Vybrant Music
Iggy (OREO)




  • The songs were first performed at LOONAbirth, a day before their official release.
  • The album has four physical versions:
Normal A version Normal B version
  • Photobook version A
  • 1 of 12 Normal ver. A photocards
  • White CD
  • Photobook version B
  • 1 of 12 Normal ver. B photocards
  • Normal version B cover CD
Limited A version Limited B version
  • Photobook version A
  • 1 of 2 Limited ver. A photocards
  • Black CD
  • Photobook version B
  • 1 of 2 Limited ver. B photocards
  • Limited version B cover CD