Prologue: Chaebol's daughter

Three guys who live to kill.

Three girls who live to safe people life.

A citizen [Momo] who is a dangerous weapon to one of the biggest mafia gangs in Seoul, South Korea. A doctor [tzuyu] who's willingly to give up her life to save her best friend. A FBI agent [Nayeon] who goes undercover to serve justice.

Who will survive at the end?

Starting:
Momo from Twice
Nayeon from Twice
Tzuyu from Twice

Suga From BTS
Mingyu from Seventeen
Mark from Got7