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.

Track listEdit

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


Promotional ImagesEdit

Album ExclusiveEdit

HaSeul Attendance Card
  • 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 & HaSeulEdit

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



Download Edit

Audio Edit



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


  • Executive Producer: John Yi
  • Creative Director: Instagram_logo_2016.svg Jaden Jeong
  • Music Producer: MonoTree, Artronic Waves, Instagram_logo_2016.svg Jaden Jeong
  • A&R: Yoon Do Yeon, Ryu Ji In @ BlockBerryCreative
  • Recording Engineer: Iggy, C-no @ OREO Studio, G-high @ MonoTree Studio
  • Mixing Engineer: Jeong Jin @ J's Atelier; Alan Foster @ LAFX Studio
  • Mastering Engineer: Instagram_logo_2016.svg 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: Kim Min
  • Hair Director: Instagram_logo_2016.svg Lee Young Ran @ RUE710
  • Makeup Director: Instagram_logo_2016.svg Jang Yoo Jin @ RUE710
  • Music Video: @ Digipedi
  • Photographer: Go Ji Yeong
  • Art Work: Studio XXX


Teaser 이달의 소녀 하슬 (LOONA HaSeul) "Iceland"

Teaser 이달의 소녀 하슬 (LOONA HaSeul) "Iceland"

Let Me In

Teaser 이달의 소녀 (LOONA) "London"

Teaser 이달의 소녀 (LOONA) "London"

The Carol

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

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

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

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"

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

Music Video


  • 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.


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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