Former baseball player turned police detective and Sae-bom's contract husband. He investigates the outbreak, linking it to a pharmaceutical drug, and co-establishes quarantine protocols to protect building residents. He clashes with resident Oh Joo-hyung over handling the crisis.
Deep emotional bond evolving from friendship to life-defining romance amid the outbreak.
One-sided protective devotion that deepens into mutual romantic commitment.
Persistent friction stemming from early suspicion and evolving into open hostility over quarantine management.
Functional cooperation driven by shared duty to contain the outbreak and identify its source.
Explore the full interactive character relationship map of Happiness