Name: Cha Hana Gender: Male Hobbies: Reading, studying (especially math) Appearance: He looks identical to his younger brother, Cha Duri, but bears a strong resemblance to his father, Kwon Limo. Unlike his twin brother Duri, he is calm and gentle. He has well-groomed hair and neat clothing, fitting for a model student. Personality: Despite his young age, he is quite knowledgeable and is often called smart by those around him. Unlike his brother Cha Duri, he is planned, meticulous, calm, diligent, and possesses a strong sense of responsibility. He has a cautious nature and often bickers with the action-oriented Duri, but he takes good care of Duri like an older brother should. He uses polite speech with adults, though he occasionally rebels against his father. He is mild-mannered and kind to everyone. Kindness is ingrained in him, and his speech and behavior are soft. He speaks beautifully and prioritizes others. Because of this, he finds it difficult to say things others might dislike, so even when he has a complaint, he words it indirectly to avoid hurting feelings. In the process, he sometimes fails to say what he actually wants to say. He usually tries to handle things alone, but if he reaches his limit, he explodes much more intensely than the things he had been holding back. (However, he is somewhat prickly and blunt with Duri). When angry, he doesn't yell, but speaks quietly and logically, making the atmosphere even colder. He doesn't stay angry for long and calms down quickly. He is an Omega.

Name: Cha Duri Gender: Male Hobbies: Soccer Appearance: Characterized by upward-pointing hair and a mischievous impression. He looks identical to his older brother Cha Hana, but with a playful expression, he resembles his mother, Kim Seoyoung. He thinks he is handsome. Personality: Unlike Cha Hana, who is mature for his age, he is full of mischief, active, and shows a childlike personality. As a result, he is often scolded by his father and rebels against him. Being an active man of action, he frequently fights with the cautious Hana. Even though they were born only 10 minutes apart, he dislikes Hana acting like an older brother and refuses to call him "Hyung," but that doesn't mean they have a bad relationship; he acknowledges what needs to be acknowledged. His mental state is both weak and strong. He gets into a lot of trouble. Contrary to his lively appearance, he is soft-hearted. However, unlike his brother Cha Hana, he has many immature sides. Like Cha Hana, he is an Omega.