[+ +] (plus plus) 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.


‘+ +’ 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.


  1. "+ +" - 00:58
  2. "Hi High" - 3:16
  3. "favOriTe" - 3:14
  4. "열기" - 3:30
  5. "Perfect Love" - 3:34
  6. "Stylish" - 3:29



Behind The ScenesEdit





Audio Edit



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)
"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)


  • Executive Producer: Lee Jong Myung
  • Creative Director: Instagram_logo_2016.svg Jaden Jeong
  • Music Producer: MonoTree, Artronic Waves, Instagram_logo_2016.svg Jaden Jeong
  • A&R: Ryu Ji In, Kim Hyun Ho @ BlockBerryCreative
  • Recording Engineer: GDLO, G-high @ MonoTree Studio; Min Seong Soo @ doobdoob Studio; Jung Eun King @ InGrid Studio; Iggy (OREO) @ OREO Studio
  • Mixing Engineer: Joey Mclaren @ Relic studio; Hwang Hyun @ MonoTree Studio; Ko Hyun Jung @ Koko sound Studio; Yoo Won Gwon @ Studio SEAN; Kim Seok Min @ Mapps Studio
  • Mastering Engineer: Instagram_logo_2016.svg Kwon Nam Woo @ 821 Sound Mastering]
  • Project Supervisor: Park Se Jin
  • Management Director: Yoon In Ro
  • Management: Lee Geun Mook, Han Do Ho, Oh Ji Mae, Shim Sung Hwan, Min Dong Hyuk, Jung Min Jeol, Baek Gyung Taek, Ko Jae Sun
  • Accounting: Jang Hye Gyung
  • Chief Communication Officer: Nam An Woo
  • Communication: Park Bo Ra, Bang Bo Mi, Kim Sun Gyung, Wang Ha Rim
  • Cooperation: Yoon Do Yeon
  • Training: Park Sang Ho
  • Casting: Jo Yong Jin
  • Styling Director: Kim Min @ BlockBerryAtelier
  • Hair Director: Jo Cheon Il @ BlockBerryAtelier
  • Makeup Director: Instagram_logo_2016.svg Jang Yoo Jin @ BlockBerryAtelier
  • Music Video: @ Digipedi
  • Performance Directing by: "CaShe" (Hyungyu HG Kim, Faryoung Kim)
  • Photographer: Instagram_logo_2016.svg Mugunghwa Sonyeo (mugung)
  • Art Director: Lee Moon Yeong @ Digipedi
  • Art Work: Studio XXX


MV 이달의 소녀 (LOONA) "Hi High" Original Choreography Ver

MV 이달의 소녀 (LOONA) "Hi High" Original Choreography Ver.


  • 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
  • The album was chosen as the 17th best k-pop album of 2018 by Billboard.[1]
  • For the photoshoot, the members were split into two units based on height:
    • Up unit (Tall): HeeJin, HyunJin, Kim Lip, JinSoul, Yves, Olivia Hye
    • Line unit (Short): HaSeul, YeoJin, ViVi, Choerry, Chuu, Go Won


  1. Billboard - The 20 Best K-pop Albums of 2018


v - e
HeeJinHyunJinHaSeulYeoJinViViKim LipJinSoulChoerryYvesChuuGo WonOlivia Hye
Solo singles
Mini albums
Repackage albums
Digital singles The Carol 2.0favOriTe
Exclusive releases
Concerts LOOΠΔbirth (2018) • LOOΠΔ Concert [LOOΠΔVERSE] (2019)
Other LOOΠΔ x Study Group (2018) • LOOΠΔ Cinema Theory: Up & Line (2018) • LOOΠΔ Premier Greeting: Line & Up (2018) • LOOΠΔ Studio (2018)
Dramas WoomannaDating Class
Shows Insane Quiz Show Season 2The GashinasShows Appearances : InterviewsLivestreamsRadio Shows
Others LOONA TVMiscellaneous VideosMusic VideosTeasers
Characters HeeJinHyunJinHaSeulYeoJinViViKim LipJinSoulChoerryYvesChuuGo WonOlivia Hye
Locations EarthCosmosEden
Analysis Music Videos ViViDAround YouLet Me InI'll Be ThereThe CarolKiss LaterEveryday I Love YouEveryday I Need YouEclipseSinging in the RainLove Cherry MotionnewHeart AttackOne & OnlyEgoistfavOriTefavOriTeHi HighButterfly
Cinema Theory ViVi Letter to Hong KongSee SawStarlightI Like You More Nowone
Teasers Reveal Teaser (OEC)XIXXIIXXIIIXXIVXone
Other Lore Möbius Strip TheoryThe Color TheoryCultural ReferencesdlrowehtanoolPhases of LOONAMinor theories
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