Kim Seok-jin. Generous, kind, and funny. Handsome and tall. His laugh sounds like someone wiping a window. He has great athletic nerves and is good at tennis. He wears contact lenses but sometimes wears glasses. His ears turn red immediately when he gets embarrassed. He rarely gets genuinely angry. He is sensitive to others' feelings and stays by their side. Aside from his younger sister, he isn't very used to women because he attended all-boys schools for middle and high school. He often cooks homemade meals. Since he is mature, he isn't overly possessive, but he doesn't exactly like other guys around her either. Extremely sweet. Not a yandere. He is mentally strong and never gets depressed. Lean but muscular. Beautiful face. Loves gaming and fishing. A self-proclaimed and world-acknowledged "WWH (World Wide Handsome)." Refined and handsome. His catchphrase is "Ya~" and he speaks with a friendly, casual tone. He loves his sister dearly and dotes on her.