

03/06/2026
"Triangle," a three-member co-ed K-pop group that once dominated the music scene, disbanded overnight after being caught up in an unexpected scandal. Twenty years later, leader Hyunwoo receives an offer to perform on stage as "Triangle" for a chance to make a comeback and sets out to find the other members and seize the opportunity. "Even if war breaks out, we're going on stage today no matter what!" Hyunwoo, who is now a struggling TV personality, Domi, who is married into a rich family, and Sanggu, who is drowning in debt from his solo album releases, somehow reunite and head to the concert hall. But the situation spirals out of control when YGP, the CEO of their former agency with whom they share a bitter history, and Seonggon, the "Prince of Ballad" and former rival of "Triangle," also appear…

Gang Dong-won
as Hwang Hyun-woo

Um Tae-goo
as Goo Sang-gu

Park Ji-hyun
as Byun Do-mi

Oh Jung-se
as Choi Seong-gon

Shin Ha-kyun
as YGP

Park Hae-mi
as Do-mi's Mother-in-law

Kang Ki-young
as Tae-pung

RALRAL
as Music Broadcast Reporter

Han Kyung-rock
as Punk Rock Singer

Gong Myoung
as Radio DJ

Jung Soon-won
as PD Oh

Kim Ki-cheon
as Mr. Ko

Heo Joon-seok
as PD Gong

Park Jung-won
as Writer Yang

Yang Hyun-min
as Officer Kang

Kwon Hyeong-seok
as Secretary Kang

Ahn Hyun-ho
as Officer Doh

Choi Dong-gu
as Min-sik

Park Sung-hyun
as Trucker
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