HaSeul and LOONA & HaSeul are the first single album sets by HaSeul of South Korean girl group LOOΠΔ. It was released on December 15, 2016 as the third part of the “Girl of the Month” project.

The physical album was sold in two separate parts: the first album titled HaSeul featured HaSeul solo, while the second album titled LOONA & HaSeul featured HaSeul alongside HyunJin and HeeJin.


The world of LOONA, compiling singles with each new member, expands with HaSeul. A single by HaSeul, the third member of rookie girl group Girls of the Month.

Following HeeJin’s colorful-vibe pop in “ViViD” and HyunJin’s longing of first love in “Around You”, rookie girl group LOONA has revealed the third member, HaSeul.

HaSeul was revealed in a short-blond tomboy concept as well as a long-haired girl concept across [teasers at] day and night, immediately capturing the attention of fans who await LOONA. HaSeul, who has a charm that both boyish and girlish traits coexist in her, has maximized that in music and visuals through her first single, “Let Me In”.

LOONA is a new-concept girl group that grows together with fans who recognized the girls early on with each new member, updating new content every day on social media and YouTube and meeting with fans through individual fansigns.

The girls’ journey to complete the girl group LOONA has now just raised its sail.[1]

차곡차곡 멤버마다 싱글을 쌓아가는 ‘이달의 소녀’의 세계관은 ‘하슬’로 확장되어 간다.

신인 걸그룹 ‘이달의 소녀’의 세 번째 멤버 ‘하슬’의 싱글.

컬러풀 바이브의 팝 음악 “ViViD”의 ‘희진’, 첫 사랑의 애달픔을 담았던 “다녀가요”의 ‘현진’에 이어 신인 걸그룹 ‘이달의 소녀’는 세 번째 멤버 ‘하슬’을 공개했다.

‘하슬’은 짧은 금발의 톰보이 컨셉과 긴 머리의 소녀 컨셉을 밤과 낮에 걸쳐 공개하며 ‘이달의 소녀’를 기대하는 팬들의 눈길을 한 번에 끌었다. 소녀의 느낌과 소년의 느낌이 한꺼번에 공존하는 매력을 지닌 ‘하슬’은 자신의 첫 싱글 “소년, 소녀”를 통해 그 음악과 비주얼을 극대화했다.

새 멤버가 공개될 때마다 관심의 크기를 늘려가며 소녀들을 미리 알아봐준 팬들과 함께 성장해나가는 신개념 걸그룹 ‘이달의 소녀’는 공식 SNS와 유튜브 채널을 통해 매일 컨텐츠를 업데이트 하고 있으며 멤버별 팬사인회를 통해 팬들과 만나고 있다.

걸그룹 ‘이달의 소녀’를 완성하기 위한 소녀들의 여정은 이제 막 닻을 올렸다.[2]

Track list[]

  1. The Carol” (HaSeul, HyunJin, HeeJin) – 3:26
  2. Let Me In (소년, 소녀)” (HaSeul) – 3:07


Promotional Images[]

The teasers don’t have any special captions.[3]

Album Exclusive[]

HaSeul Attendance Card.jpg
  • Each album contained a green attendance card. If the owner of the album attended a HaSeul fansign they would have their card stamped. If they managed to get all twelve attendance cards stamped, one for each member of LOONA, then they would get the opportunity to meet all twelve members of LOONA at LOONAbirth, have their picture taken with one of the girls, and have a mini private concert.



LOONA & HaSeul[]

Each album comes with one random photocard, two possible photocards in each version, total of four possible photocards.


Posters are limited edition and could be chosen to be purchased with the album

Behind the Scenes[]







Songs Lyrics Composers Arrangers
Let Me In (소년, 소녀) Woong Kim (웅킴) (OREO)
The Carol G-High (MonoTree)
Park Asher
G-High (MonoTree)
Choi Young Kyoung (최영경) (MonoTree)
Park Asher (박아셀) (MonoTree)
Park Asher


  • Executive Producer: John Yi
  • Creative Director: Instagram Icon.png Jaden Jeong
  • Music Producer: Instagram Icon.png MonoTree, Instagram Icon.png Artronic Waves, Instagram Icon.png Jaden Jeong
  • A&R: Yoon Do Yeon, Instagram Icon.png Ryu Ji In @ BlockBerryCreative
  • Recording Engineer: Iggy, C-no @ OREO Studio, Instagram Icon.png G-High @ MonoTree Studio
  • Mixing Engineer: Jeong Jin @ J's Atelier; Alan Foster @ LAFX Studio
  • Mastering Engineer: Instagram Icon.png Kwon Nam Woo @ JFS Mastering Studio
  • Management Director: Kim Yeong Do
  • Management: Yoon In Ro, Lee Geun Mook, Seo Won Bae, Park Yong Tae, Song Yuri
  • Administration: Jae Kang, Park Sang Ho
  • Press Publicist: HNS HQ
  • Styling Director: Instagram Icon.png Kim Min
  • Hair Director: Instagram Icon.png Lee Young Ran @ RUE710
  • Makeup Director: Instagram Icon.png Jang Yoo Jin @ RUE710
  • Music Video: @ Instagram Icon.png DIGIPEDI
  • Photographer: Go Ji Yeong
  • Art Work: Studio XXX



Teaser 이달의 소녀 하슬 (LOONA HaSeul) "Iceland"

Let Me In


Teaser 이달의 소녀 (LOONA) "London"

The Carol


MV 이달의 소녀 하슬 (LOOΠΔ HaSeul) "소년, 소녀 (Let Me In)"


이달의 소녀 하슬 (LOONA HaSeul) "소년, 소녀 Let Me In (100% Real Live)"


MV 이달의 소녀 희진, 현진, 하슬 (LOOΠΔ HeeJin, HyunJin, HaSeul) "The Carol"


  • As of April 2020, the single albums combined have sold 3,406 copies on Hanteo, and 10,982 copies on Gaon.
  • The difference between the physical albums was their CD colors, the cover images, and the photo cards that can be received at random when purchasing the CDs. All other contents of the albums are identical.
    • There can be a max of two different photo cards found in the album HaSeul that feature HaSeul solo, and a max of two different photo cards found in the album LOONA & HaSeul that feature HaSeul alongside HyunJin and HeeJin.


  1. Early Loona Album Descriptions (HaSeul). Team Subbits. 2020.05.30
  2. HaSeul 앨범소개 (Album Description). Melon. 2016.12.15
  3. Teasers : 1 2 3 4 5 6 7 8