A debt-ridden man who hires Jang Gil-ryong to murder his father, Park Dong-sik, to collect life insurance. When the insurance payout is blocked and Gil-ryong threatens him, Jae-yeong attempts to murder Gil-ryong in an abandoned building. He is overpowered and ultimately killed by Beon-jun, whose body and identity are subsequently stolen to evade the police manhunt.
Joon-jae's con-artist mentor and modern-day reincarnation of the Joseon-era merchant's son Park Moo. He helps Joon-jae track Shim Cheong, investigates past-life crimes, and later becomes a lecturer after the main events.
Experienced survivor and strategist aiding the main group.
A smuggler whose brother dies from the virus. He initially hides the truth about the infected container, causes chaos at the hospital, and later kills the sole survivor Monssai in a vengeful attack.
A resident who moves into the house alongside Jae-pil. He shares the same fate as his friend, drawing police attention and being wrongly suspected of kidnapping following the rescue attempt.
President Park's loyal bodyguard who clashes with KCIA Director Kim Gyu-pyeong over authority. He secretly orders the assassination of former director Park Yong-gak in Paris and pushes for martial law to suppress pro-democracy protests. During the climactic dinner, he is shot by Kim, survives briefly, but is ultimately killed by Kim's bullet.
Reporter Yoon Sang-sam investigates Park Jong-chul’s death despite restrictions against reporting it. After receiving autopsy evidence from Prosecutor Choi Hwan, he publishes findings that contradict the police report and informs the public that Jong-chul died from asphyxiation rather than a heart attack.
Dae-bok works at Joo-young's urology clinic and has recently started dating Yi-ra, a wedding planner. When she tells him she is pregnant during a baseball game, he immediately proposes. As they prepare for the wedding, their frequent arguments and Yi-ra's cynical outlook make him fear she sees no long-term future for them, so he desperately tries to change her mind.
Hyuk-geun is Cha-kyung's lover. A year after she dies in a car accident, he still cannot accept her death or move on, and lives in a fantasy in which she is still alive. His grief and his relationship with Cha-kyung are central to the changes unfolding between him and Gi-ok.
Dae-sik is a violent figure who confronts Joo-hwan during the collapse of JC Group’s power. He reveals that Hyun-jung is Joo-hwan’s mother and accuses her of killing a man while pregnant. He then threatens Joo-hwan in an attempt to locate the sex tape capable of damaging JC Group.
He is among the people who ambush Kim Seong-beom while Kim follows a lead about Kim Jin-hwan. During the confrontation, Geun-su and the others imply that the official account of Seong-beom's son's death is false and that Seong-beom has been lured there to be killed.
A dedicated intelligence agent assigned to recover the fallen AI satellite. His mission conflicts with Hae-Gwan's personal quest until he develops sympathy.
Lee Hee-jun has 58 screen credits in a career dating back to 2007. Their work is anchored in the Concrete Utopia Collection universe with 1 titles. Signature works include Karma, Mouse, A Killer Paradox. Explore the interactive character relationship maps on each title page to trace how their roles connect across franchises.
Related entry on Wikidata (Q492243), public domain (CC0).
