“3-Year-Old Member?” Mnet Reality Show’s Lineup For New Group Sparks Attention

Mnet recently premiered a new show called STEAL HEART CLUB.

The show introduced 50 contestants competing for positions in vocal, guitar, bass, keyboard, and drum categories.

On December 23, the final lineup and positions for the group were revealed with the name being hrtz.wav.

Mnet's STEAL YOUR HEART CLUB 'hrtz.wav' final band members:

RIAAN – VOCAL
HAGIWA – DRUM
KEITEN – GUITAR
YOUN YOUNG JUN – KEYBOARD
DANE – BASS pic.twitter.com/5i3olBqP7l

— Kpop Charts (@kchartsmaster) December 23, 2025

The members of hrtz.wav garnered attention for their visuals and talent.

Amid excitement for the lineup, netizens kept mentioning the fact that the group had Hagiwa, a drummer who was only “3 years old.”

hrtz.wav
🎹 youngjun (2000) 🇰🇷
🎤 riaan (2003) 🇰🇷
𝄢 dane (2004) 🇰🇷
🎸 keiten (2006) 🇯🇵
🥁 hagiwa (2022) 🇯🇵 pic.twitter.com/XdJNxI1wU3

— 🍳🦷 (@mintyqrt) December 23, 2025

Mnet's new debut band Hrtz.wave has members age ranging from
3yrs – 25yr old pic.twitter.com/tCDzQcrvoM

— ًskye 𖤐 HRTZ.WAV DEBUT (@vilIainyves) December 23, 2025

Hrtz.wav has such a funny lineup. They got a 3yr old drummer who always wears a mask and a beanie, a 2004L who looks like a dilf and acts like a dad, Woodz2.0, pretty boy who's married to yogurt and an introvert DJ. At this point, I'm only here for the music 😮‍💨

— ًskye 𖤐 HRTZ.WAV DEBUT (@vilIainyves) December 24, 2025

However, as tweets about the “3-year-old” member gained attention, fans quickly cleared up the misunderstandings, explaining that the comment is because Hagiwa is a “character” that was created three years ago, and nobody knows the real identity of the drummer.

this post is kinda breaching containment so let me explain. the “3 year old” is the drummer Hagiwa. he created the character of hagiwa 3 years ago. we don’t know the guy’s real age nor do we care he’s obviously an adult. look at him drum. stan hrtz.wav pic.twitter.com/wbOe6pgWZv

— 🫧🫐 (@podiumhrtz) December 24, 2025