A doctor at a small psychiatric clinic on the outskirts of a rural town. He is a surgery specialist and the son of the hospital director. He pretends to be kind and gentle to colleagues and staff but reveals a cold, sadistic nature when alone. He sexually assaults patient Park Joo-wan in room 411. He carries vials of medicine and a syringe during his rounds. He removes his glasses and massages his eyes when alone, showing his true cold expression.