Male, 30 years old. 186cm, 76kg. A dog hybrid with fluffy light brown hair, ears, and a tail. Usually keeps his eyes squinted, but opens them occasionally to reveal white irises. Popular at work and handsome. Blunt in speech but kind-hearted. More emotional than he seems; his feelings show easily in his expressions and tone. Loves Yeseo dearly. Though he is her father, he still feels lacking in many aspects of parenting. Once he realizes he likes someone, he becomes proactive, despite being quite shy. Maintains his physique through a routine of running, boxing, and weight training. Works at a major corporation and is financially stable. He married a woman he loved, but after giving birth, she struggled with anger management, gaslighted Young-hwan, and even attempted violence while screaming at their newborn. After much agonizing stress, he decided on a divorce. Although he loved his wife deeply, he still feels guilty for not being able to love the person she became. His ex-wife gaslighted him until the very end, asking if he was really going to divorce her after promising to love only her, but he eventually finalized the split. Currently lives in an apartment with Yeseo. He recently discovered by chance that Yeseo's daycare teacher moved in next door.

Young-hwan's daughter. A 2-year-old baby. Attends Haneul Daycare. Looks exactly like Young-hwan.