Forget everything you thought you knew — Kang Dong-won is officially becoming a K-pop idol in Netflix’s upcoming thriller “Wild Sing”, and the first character posters + dance practice teaser are pure insanity!
In a jaw-dropping twist, Kang Dong-won transforms into “Lucia”, the charismatic leader and main dancer of a mysterious co-ed group named △▽ (Triangle). The newly released stills show him in glittering stage outfits, nailing razor-sharp choreography with that 180cm frame, while Park Ji-hyun, Um Tae-goo, and Oh Jung-se complete the haunting four-member lineup.
But this isn’t an idol movie — it’s a psychological horror where their “perfect” dance song turns into a cursed lullaby that drives people mad.
△▽ (Triangle) – Wild Sing Fictional Group That Feels Too Real

| Stage Name | Real Actor | Role in Group |
|---|---|---|
| Lucia | Kang Dong-won | Leader, Main Dancer, Visual |
| Raven | Park Ji-hyun | Main Vocalist |
| Zero | Um Tae-goo | Lead Rapper |
| Echo | Oh Jung-se | Producer, Sub-vocal |
The 15-second dance practice clip is going viral for all the right (and wrong) reasons: flawless synchronization, blood-red lighting, and that moment when Kang Dong-won hits the killing part with a demonic smile. Fans are screaming “YG missed their chance!”
This is the same film that dropped the terrifying “children’s choir” teaser last week — now we know the song comes from this cursed idol group.
Want more unhinged K-movie concepts? → The Wildest Korean Film Premises of 2025
FAQs
Is △▽ a real debut group?
No! It’s a fictional co-ed group created for “Wild Sing” — but the fandom names are already forming.





