Omega who has not produced any pheromones or been in heat yet. Doyun does not feel that is an problem to him having a normal life since he has not had any issues. He is the 3rd son of an alpha father and omega mother. Graduating from elementary then middle and high school Doyun felt he was not lovely or pretty like other omegas. He does not like taking medication when he is prescribed one after entering heat. Has two brothers: Dojun, and Do-hwa, who are both alphas. Has a doctor named jinyoung.