Youth youth by young! 안녕하세요, 이달의 소녀 와이와이바이와이입니다!
Youth youth by young! Hello, we are LOOΠΔ / yyxy!


yyxy (Hangul: 이달의 소녀 yyxy), stylized as LOOΠΔ/yyxy, is the third and final pre-debut sub-unit of the girl group LOOΠΔ. They debuted with members Yves, Chuu, Go Won, and Olivia Hye on May 30, 2018 with the mini-album beauty&thebeat.


The unit’s Korean name is pronounced Idalui Sonyeo Wai-wai-bai-wai (Korean: 이달의 소녀 yyxy) from the Sino-Korean root meaning “Girl of the Month”, combined with the made-up neanthropic chromosome “yyxy”.

Overall Concept[]

yyxy is composed of four girls held in a separate dimension called Eden. In “love4eva”, it’s revealed that if they eat their individual Forbidden Fruit, they are expelled from Eden. They soon feel trapped and adventurous, so Yves convinces Chuu and Go Won to eat their forbidden fruit and escape with her. Olivia Hye also wants to go but is not brave enough to eat her fruit. They leave without her.

Olivia eventually eats her fruit and tries to follow them, but becomes lost and angry. She knows that Yves plans to create a new dimension, and decides to destroy it out of anger at being abandoned by her friends.

This journey is about the ego of the youth. Being in love, hurt, broken, but still stepping forward, the girls capture moments of youth to complete an ego. They express that ego is falling in love with themselves, and that they must first love themselves before loving others. They declare neanthropic chromosome yyxy, different to xx or xy chromosomes.



Member Animal/Zodiac Color Fruit Emotion Unit Position*
Yves (이브) Swan Burgundy Apple Faith (믿음) Leader, Main Dancer, Lead Vocalist, Visual
Chuu (츄) Penguin Peach Strawberry Love (사랑) Main Vocalist
Go Won (고원) Butterfly Eden Green Pineapple Hope (소망) Main Rapper, Lead Dancer, Vocalist, Visual, Center
Olivia Hye (올리비아 혜) Wolf Silver (main)
 Black[1] (sub)
Blood Plum Anger (분노) Lead Dancer, Lead Rapper, Vocalist, Maknae
*Beside the leader and the maknae, the members do not have fixed positions.


Mini albums[]


  • yyxy made their debut 6 days after Yves' birthday.
  • yyxy’s first stage performance was at their own event: LOOΠΔ Premier Greeting: Line & Up. This is considered extremely unique and unheard of as debut stages for groups are usually performed on live TV shows, such as Inkigayo or M Countdown, and not at their own events.
  • yyxy is the first sub-unit in LOONA to have every member go by a stage name.
  • yyxy was originally called 3/3.[2]
  • They are all heavy sleepers, but they can all get themselves ready the fastest.[3]
  • On average, they had the least amount of time to train with the company before debut.
  • One of the sub-unit's biggest fans is Jihan (Han Jihyo) of Weeekly. She has interacted with every member of the sub-unit, but has yet to interact with Go Won individually. Jihan's representative color is Maroon Red, which is the closest to Yves' Burgundy.

See also[]

Check out the gallery of yyxy and the unit in-universe!


  1. K-Pop Idolchart “Invited seat: LOONA pt1” @3:11. YouTube. 2020.03.18
  2. LOONA TV Prequel16 #ijk
  3. Blip Data Lab Ep. 3