[#] (Hash,[1][2][3] Hangul: 해시; also known as Sharp,[4] Hangul: 샵) is the second mini-album from South Korean girl group LOOΠΔ. It was released on February 5, 2020, including lead single “365” and title track “So What”.

It was announced[5] on January 7, 2020 via Fancafe that HaSeul would not be participating in promotions for this album due to mental health concerns.

The album also comes with a CD Exclusive, including track Day & Night.

The members’ individual teasers were released at 12am (KST) and 2:05pm (KST), the latter being in reference to the date the album was released, February 5.



If [+ +] was about the basic combination of adding each other, [X X] was about the applied combination of multiplying each other.

Just like how # has little meaning when used by itself, but manifests in special functions or great achievement when used alongside words and characters, [#] is about how we can realize results from multi-use combinations when we are together.[6]

Music Video[]

Fate collides fate in LOOΠΔ to make coincidence.

12th member, Olivia Hye and the 1st member HeeJin meets in fate and made LOOΠΔ as a whole world.

[#] does not mean much when it is used alone, but it means that when # is used in combination with words or letters, they realize the result of a multi-use combination when they are together, just as they perform a special function or great ability.

Through this album, LOOΠΔ want people to break out of the box, boundaries and prejudices, showing them to not to be afraid to challenge yourself. It is possible to make different waves more than you can imagine if you challenge yourself with your passion(BURN), and go forward.

On “THE BACK OF THE MOON”, which no one knows about, instead of a moon that does not shine on its own and always shows the same side, LOOΠΔ serves as a fuse in the heart of the whole LOOΠΔs around the world.

Through this album, LOOΠΔ is about to show the whole different confident, challenging LOOΠΔ, not the same LOOΠΔ people all know.[7]


[+ +]가 서로가 더해졌을 때의 베이직한 결합을 담았다면 [X X]은 서로가 곱해졌을 때의 응용적인 결합을 담았다.

[#]는 단독으로 쓰일 때 크게 의미가 없으나 #가 단어나 문자와 함께 쓰일때 특별한 기능 또는 대단한 능력을 발휘하는 것처럼 서로가 함께일 때 멀티 유즈한 결합의 결과를 실현한다는 의미를 담고 있다.[8]

Music Video[]

이달의 소녀는 운명과 운명을 충돌시켜 우연을 만든다.

열두 번째 멤버 Olivia Hye와 첫 번째 멤버 희진이 숙명처럼 만나 이달의 소녀라는 하나의 세계를 완성시켰다.

[#]는 단독으로 쓰일 때 크게 의미가 없으나 #가 단어나 문자와 함께 쓰일 때 특별한 기능 또는 대단한 능력을 발휘하는 것처럼 서로가 함께일 때 멀티 유즈한 결합의 결과를 만들어 낸다는 의미를 담고 있다.

이달의 소녀는 이번 앨범을 통해 기존의 틀에서 벗어나 경계와 편견을 넘어 세상의 모든 소녀들에게 도전하는 것을 두려워하지 말고, 자리에서 일어나 뜨거운 열정(BURN)으로 세상에 도전하고 전진한다면 상상 이상의 변화의 물결을 만들어 낼 수 있다는 이야기를 전한다.

스스로 빛을 내지 않고 언제나 같은 면을 보여주는 달이 아닌 “THE BACK OF THE MOON” 아무도 모르는 ‘달의 뒷면’에서 이달의 소녀는 전 세계 이달의 소녀의 마음에 불을 붙이는 도화선 역할을 한다.

이달의 소녀는 이번 앨범을 통해 기존의 이달의 소녀가 보여준 것과는 완전히 다른, 당당하고 도전적인 모습을 보여줄 예정이다.


  1. #” – 1:06
  2. So What” – 3:18
  3. Number 1” – 3:22
  4. Oh (Yes I Am)” – 3:15
  5. Ding Ding Dong (땡땡땡)” – 2:58
  6. 365” – 3:41

CD exclusive[]

Background and release[]

On March 31, 2019, a teaser titled “#” was released on LOONA’s official YouTube channel. This release came directly after conclusion of official promotions for [X X], LOONA’s previous album, identical to the release of the first [X X] teaser immediately following the end of [+ +] promotions. Unlike the [X X] teaser cycle, however, the next teaser for [#] would not materialize for almost nine months.

On December 13, 2019, LOONA released digital single “365” as a thank you to fans for waiting so long for the group’s return.

On December 15, 2019, a new teaser titled “#1” appeared on YouTube.[10] At midnight on January 1, 2020, LOONA posted a teaser, featuring a red moon and the words “2020 / Coming Soon / LOONA”, for their upcoming album [#] on Twitter.[11]

On January 7, a statement from BlockBerryCreative was posted to LOONA’s Fan Cafe, announcing that member HaSeul would not participate in album promotions due to receiving treatment for anxiety.[12]

The first member promotional photo, featuring Olivia Hye, was published on January 13[13], with the final teaser of the sequence, featuring YeoJin, appearing on January 18.[14] The tracklist for the album, including title track “So What” and pre-release single “365”, was revealed on January 20.[15] Album preorders were also announced via the group’s social media.

A few days later, on January 28, it was announced that a live showcase would be held via the group’s VLIVE on February 5 from Yes24 Hall.[16]

The music video for title track “So What” was released, along with the rest of the album, on February 5, 2020 at 6PM KST.[17]


Jaden Jeong, who acted as LOONA’s creative director and head of A&R since the beginning of the LOONA project, left the enterprise following his involvment in [X X]. Longtime A&R members Ryu Ji In (HeeJin to [X X]) and Kim Hyun Ho (YeoJin to [X X]) also departed around the same time.

Lee Soo Man, founder of multinational entertainment company SM Entertainment, worked as “Music Producer” on [#]. LOONA is the first non-SM artist Lee Soo Man has produced for.[18] He was impressed by LOONA’s 2019 dance cover of “Cherry Bomb”, a song by NCT 127 of SM Entertainment. According to LOONA member Yves, “While working on his global project, [Lee Soo Man] found out about us. After seeing our cover of ‘Cherry Bomb’, he saw potential in us and gladly participated as a producer, for which we are grateful for.”[19]

Every track from the [#] mini-album (seven tracks in total) was produced by at least one producer from music rights company EKKO Music Rights, which was co-founded by Lee Soo Man. This mini-album is the first post-debut LOONA music project not to feature songs made by South Korean producing team MonoTree.


LOONA made their comeback stage on M! Countdown along with other artists, such as GFriend and EVERGLOW. [20]

LOONA earned their first ever #1 of the week with “So What” on M! Countdown on March 12.[21]



Behind the Scenes[]

Photo Shoot[]







# Song Lyrics Composers Arrangers
1 # - Coach & Sendo
2 So What Jo Yoonkyung David Anthony
Anna Timgren
David Anthony
3 Number 1 Kim Jin (makeumine works)
Tara Nabavi
Malin Johansson
4 Oh (Yes I Am) Le'mon Coach & Sendo
Coach & Sendo
5 Ding Ding Dong (땡땡땡) Kim Yeon Seo minGtion
Kim Yeon Seo
6 365 Hwang Yubin Johan Gustafsson
Hayley Aitken
Hidden #

Day & Night

Kim Yeon Seo Coach & Sendo
Kim Yeon Seo
Coach & Sendo

Producers & Lyricists - social media accounts:

Producing Teams

Other Producers





  • This project was also referred to by fans as “B#RN”, after logos on the shirts worn by LOONA members in their Fire” cover and the onscreen text in the original “#” teaser.
  • The teaser photos had captions that were later revealed to be lyrics from their title track "So What".
  • This album was originally titled “Sharp” rather than “Hash”. The name was changed some time after the departure of Jaden Jeong from BlockBerry Creative.
  • This mini-album is the first post-debut LOONA project not to feature songs by MonoTree.
  • Filming for portions of the “So What” music video and related [#] teasers took place in Thailand.
  • Lee Soo Man, the founder of SM Entertainment, participated in the production of the album, after watching LOONA's “Cherry Bomb” cover.[19]
    • This makes LOONA the first non-SM artist/group he has produced for.[18]
  • Yves described title track “So What” as “Maximizing their girl crush qualities”[22]
  • Olivia Hye said the hardest part of filming the “So What” M/V was that it was hot while filming the choreography scenes [23]
    • They drank a lot of water during filming and carried wet towels around their necks.
  • Their stylist made 12 outfits in 1 week for the jacket photo shoot[24].


  1. MBN “걸그룹 이달의소녀, 미 아이튠스 싱글·앨범 차트 1위 석권 (Girl Group LOONA Wins No.1 on iTunes Single Album Chart)” NAVER. 2019.12.16
  2. Orrery/nim (@orrery_nim) “Olivia Hye: Our teaser for ‘Sharp—’ / Go Won: It’s ‘Hash.’” Twitter. 2020.01.21
  3. SBS “SHINDONG GAYO with LOONA” @ 3:50. YouTube. 2020.02.09
  4. KPOP TOWN "LOONA (이달의 소녀) 2nd Mini Album - [Sharp]" Retrieved 2020.02.02
  5. Orrery/nim (@orrery_nim) “From the fancafe” Twitter. 2020.01.07
  6. LOONA’s Subbits (@gointosubbit) “#LOONA [#] Album description (translated from Korean)” Twitter. January 22, 2020
  7. loonatheworld “이달의 소녀 (LOONA) ‘So What’” video description. YouTube. 2020.02.05
  8. Aladin “이달의 소녀 - 미니 2집 [# [한정 A] (LOONA Second Mini Album [#] (Normal A)]” Retrieved 2020.02.02
  9. loonatheworld (@loonatheworld) “#LOONA 's mini album [#] pre-order is now available. Limited A,B version contains a CD ONLY song🎁” Instagram. 2020.01.22
  10. LOONA releases striking teaser” Soompi. 2019.12.15
  11. loonatheworld “2020 ‘#’ Coming Soon” Twitter. 2020.01.01
  12. BlockBerryCreative announces HaSeul’s hiatus due to anxiety concerns.” Soompi. 2020.01.07
  13. loonatheworld “끌어내 더” Twitter. 2020.01.13
  14. loonathworld “더 자유롭게” Twitter. 2020.01.18
  15. LOONA signals comeback with teaser Soompi.
  16. #이달의소녀 의 미니앨범 [#] 발매 기념 쇼케이스가 개최됩니다!” Twitter. 2020.01.28
  17. “LOONA releases confident ‘So What’ M/V” Soompi. 2020.02.05
  18. 18.0 18.1 Orrery/nim (@orrery_nim) "Lee Soo Man (From SM) directly participated in the production of LOONA's latest album {#]" Twitter. 2020.02.04
  19. 19.0 19.1 Orrery/nim (@orrery_nim) "Yves: 'While working on his global project, [Lee Soo Man found out about us.']" Twitter. 2020.02.05
  20. Performances from LOONA, GFriend, and EVERGLOW on M!Countdown Soompi. 2020.02.06
  21. LOONA takes 1st win with ‘So What’” Soompi. 2020.03.12
  22. LOONA shares goals for So What at showcase” Soompi. 2020.02.05
  23. ARIRANG K-POP “[Pops in Seoul] The girl crush charms, LOONA(이달의 소녀)’s Interview for ‘So What’” YouTube. 2020.02.23
  24. LOONA TV EP.584