Pre-debut Boy Groups

hrtz.wav Members Profile & Facts

HRTZ.WAV Members

hrtz.wav is an upcoming five-member Korean boy band formed on the survival show STEAL HEART CLUB. The group members consist of Hagiwa, Dane, Keitan, Riaan, and Youn Youngjun. Their debut is unknown.

hrtz.wav Profile

DebutN/A
Active Years2025-present
hrtz.wav MembersHagiwa, Dane, Keitan, Riaan, Youn Youngjun
GenreN/A
StatusPre-debut
LabelN/A
Oldest MemberYoun Youngjun
Youngest MemberHagiwa
Former MemberN/A
Fandom NameN/A

hrtz.wav Facts:

– The group was formed on the survival show STEAL HEART CLUB.

SOCIAL MEDIA HANDLES
Instagram: hrtzwav
Youtube: @hrtzwav
Twitter: hrtzwav
TikTok: @hrtzwav 

hrtz.wav Members Profile

1. Youn Youngjun

Yoon Youngjun (HRTZ.WAV)
Yoon Youngjun
Stage NameYYJ
Birth NameYoon/ Youn Young-jun (윤영준)
PositionPianist
BirthdayMarch 21, 2000
Active Years2025-present
Age25 (in 2026)
Zodiac SignAries
HeightN/A
WeightN/A
NationalityKorean
Blood TypeN/A
MBTIINFP (previously INTJ)

Youn Youngjun Facts:

– Youngjun’s musical background is as a DJ.
– He was born in Suwon, Gyeonggi-do, South Korea, and moved to Ansan when he was 3 years old.
– He is currently active as a DJ under WAY BETTER, using the stage name YYJ.
– He played piano for the OST “Meet Garfield” in The Garfield Movie.
– He is a former member of NND (2024-2025).
– He originally trained to become a professional pianist, but after his teacher suggested joining a band, he auditioned and became part of one, where he met future NND member DAYN.
– After the band’s debut plans fell apart, DAYN introduced him to the CEO of TAKIEL Inc., where Youngjun worked as an office employee.
– His favorite color is black.
– He often says “ahh” and “uhh” when he speaks.
– If he had to compare himself to an animal, he would choose a meerkat.
– Youn Youngjun is the oldest member in hrtz.wav.
– He was part of a band during his high school years.
– NND member DAYN describes him as caring, warm, and someone who is easy to love.
– The artists that match his ideal musical style are Valley and The 1965.
– He wrote and composed every song on NND’s debut album Wonder, I, which marked his first time songwriting.
– His favorite food is spicy stir-fried chicken.
– While working as staff at a Fujii Kaze concert, he felt inspired to make music again, contacted DAYN, and this led to the formation of NND.
– His Chinese zodiac sign is Dragon.
– His hobbies include gaming (especially League of Legends), listening to pop music, and sleeping. He said he can sleep all day if given the chance.
– His biggest stage weapon is his natural presence.
– His goals include performing at Coachella and being nominated for the Korean Music Awards someday.
– He played keyboard on “Marionette” by Jungmo (former TraxX member), appeared in its music video, and also performed for JeA’s cover of IU’s “Love Wins All.”
– His charm lies in his shy personality, calm demeanor, and how easily he laughs.
– His on-stage “heart rate” is 120-130 BPM, which is also his favorite tempo.
– He wants to be a musician who draws people in and gives off positive energy.
– His final message to be remembered by is: “I’m here to steal your heart, so watch out.”
– His determination: “I’ll work hard so that the support and love people give me is never wasted.”

SOCIAL MEDIA HANDLES
Instagram: @youn9wns

2. Riaan

Lian (HRTZ.WAV)
Lian
Stage NameRiaan (리안)
Birth NameRiaan Yoon (리안윤)
PositionVocalist
BirthdayJanuary 16, 2003
Active Years2025-present
Age22 (in 2026)
Zodiac SignCapricorn
HeightN/A
WeightN/A
NationalityKorean
Blood TypeN/A
MBTIINFJ

Riaan Facts:

– Riaan is a singer-songwriter.
– He made his solo debut on July 30, 2024, with the song “Treat Me Better.”
– He trained at SM Entertainment from 2021 to 2022.
– He is under Nostalgiaa Records.
– His Chinese zodiac sign is Horse.
– He speaks both Korean and English fluently.
– The artists that influence his style include The 1975, Keshi, Janne Da Arc, and Official Hige Dandism.
– He became interested in music after watching live performances on TV, especially a Justin Bieber stage.
– He is close friends with Dane, NINE.i’s VAHN, and POLARIX’s Yang Donghwa.
– He can play both the guitar and the piano.
– His charm points are his voice, strong English skills, and smooth, rich vocals.
– He graduated from School of Performing Arts Seoul (Applied Music) and later attended Seoul Institute of the Arts (Vocal Performance).
– He wants to become a musician that others can look up to.
– His on-stage “heart rate” is 200 BPM, meaning he brings intense energy even before the performance begins.
– He wrote the songs “Magic!”, “She Said,” and “Selfie” for fellow contestant and labelmate Dane, and he writes the lyrics for all of his own music.
– His biggest strength on stage is delivering a complete and engaging performance from start to finish.
– His message to be remembered by is: “May my moment become your youth.”
– His determination: “The band boom and the RIAAN boom will definitely happen.”

SOCIAL MEDIA HANDLES
Instagram: @riaanyoon
X: @riaanyoon
TikTok: @riaanyoon

3. Dane

Dane (HRTZ.WAV)
Dane
Stage NameDane (데인)
Birth NameN/A
PositionN/A
BirthdayJuly 20, 2004
Active Years2025-present
Age21 (in 2026)
Zodiac SignCancer
HeightN/A
WeightN/A
NationalityKorean
Blood TypeN/A
MBTIENTP

Dane Facts:

– Dane is also a singer-songwriter.
– He was born in Seoul, South Korea.
– He made his solo debut on October 10, 2024, with the song “Selfie.”
– He writes, produces, and arranges all of his own music.
– He is under Nostalgiaa Records.
– His Chinese zodiac sign is Monkey.
– He trained at Kakao Entertainment from 2019 to 2021.
– He graduated from School of Performing Arts Seoul (Applied Music) and later attended Seokyeong University (Applied Music).
– He is close friends with Riaan, NINE.i’s VAHN, and POLARIX’s Yang Donghwa.
– He has appeared as a special guest performer at several of Gen Neo’s concerts.
– He plays multiple instruments, including guitar, keyboard, drums, and synthesizer.
– His charm points are his warm smile, deep voice, and ability to do everything musically.
– He is also confident in dancing.
– The artists that match his musical style are The 1975, Christian Kuria, and Keshi.
– He also composed and played instruments for Riaan’s songs “Ben & Jerry” and “Adore You.”
– He wants to be an artist who feels like a single, unforgettable moment of youth.
– He can speak Korean and English.
– His on-stage energy is described as 118 BPM, which is also the tempo of his song “She Said.”
– His secret weapon is his intense, sexy eye contact.
– His message to be remembered by: “Even if I’m not perfect, I hope I can deeply touch someone’s heart at least once.”
– His determination: “Music’s core is the bass. In <STEAL HEART CLUB>, I will become that core.”

SOCIAL MEDIA HANDLES
Instagram: @dane.youneed
X: @dane_youneed
TikTok: @dane.youneed

4. Keiten

keiten (HRTZ.WAV)
keiten
Stage NameKeiten (케이텐)
Birth NameKeiten Ishibashi (石橋啓天 / 케이텐 이시바시)
PositionGuitarist
BirthdayDecember 4, 2006
Active Years2025-present
Age19 (in 2026)
Zodiac SignSagittarius
HeightN/A
WeightN/A
NationalityJapanese
Blood TypeN/A
MBTIINTJ

Keiten Facts:

– Keiten is the guitarist of the Boston-based K-rock band Luvfiné (active since 2025).
– He was born in Tokyo, Japan.
– He discovered K-rock through his Korean friends at Berklee, who strongly influenced his musical style.
– He has a background in music as a major.
– He owns seven guitars, though he mainly plays only a few of them.
– He has been playing the guitar since 2023.
– He earned a scholarship to Berklee College of Music, majoring in Performance, but took a break from school to join the show.
– The artists that best match his musical style are DAY6, Måneskin, and Green Day.
– His favorite animal is the cheetah.
– He can also play the piano a little.
– His Chinese zodiac sign is Dog.
– He studied at MODERNK Academy.
– His favorite TV series is Brooklyn Nine-Nine.
– He believes his biggest charm is love.
– His favorite song is “Stop the Train” by John Mayer.
– His on-stage “heart rate” is described as π (3.14159) BPM.
– His favorite travel destination so far is Italy.
– The first song he learned on guitar was “Pride and Joy” by Stevie Ray Vaughan.
– He learned guitar through a mix of YouTube videos and formal lessons.
– His special strength on stage is his creative, out-of-the-box thinking.
– He can speak Japanese, English, and Korean.
– His favorite Korean band is DAY6.
– He wants to be a “1+1” type of musician (two great things combined, like cookies and cream).
– His final message to be remembered by is written in binary, which translates to “I love you.”
– His determination: “I play guitar so fast that even the future complains.”

SOCIAL MEDIA HANDLES
Instagram: @keiten.i
TikTok: @keiten.i

5. Hagiwa

Hagiwa (HRTZ.WAV)
Hagiwa
Stage Namehagiwa (하기와/ ハギワ)
Birth NameN/A
PositionMaknae, Drummer
BirthdayNovember 23, 2022
Active Years2025-present
Age3 (in 2026)
Zodiac SignSagittarius
HeightN/A
WeightN/A
NationalityJapanese
Blood TypeN/A
MBTIENFJ

Hagiwa Facts:

– Hagiwa started out as an influencer before becoming a musician.
– He keeps his real name and age private and always appears with a mask and fictional persona.
– He wants to become a drummer who is also a full-on entertainer.
– His earlier mask was inspired by the game Poppy Playtime, and he changed to his current mask in 2024.
– The artists that best match his ideal style are G-Dragon and Queen.
– His Chinese zodiac sign is Tiger.
– When he’s on stage, he wants the energy to feel as fast and intense as 800 BPM.
– His biggest charm is his masked face.
– His signature move to win over the crowd is a heart-stealing wink.
– The message he wants people to remember him by is: “Let’s have fun together!”
– His determination: “You think my face looks scary? HAGIWA isn’t scary at all, I just want to play drums and have fun!”

SOCIAL MEDIA HANDLES
Instagram: @hagiwa_dr
Threads: @hagiwa_dr
TikTok: @hagiwa_dr
YouTube: ハギワ-hagiwa-



Note: Which hrtz.wav member caught your eye first? Let us know in the comments down below! 

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WRITTEN BY

Lilian Chen

Yo! I'm Lilian, an Ahgase and a curious wordsmith on a never-ending quest for knowledge. Don't hesitate to spot any slip-ups in my work and feel free to reach out with additional facts & insights! ^^

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