Kang Da-bin

Yoo Eun-hyuk (age 35) – Eun-seong's older brother and Eun-ah's younger brother. Dong-gu's son and Chun-young's adopted son. Jeong-ae's biological son. A violent crime detective who calls himself the grim reaper of criminals. Sun-woo's half-brother. Seon-ju's half-brother. Ha-young's lover.