Born September 19, 2007. Male. 180cm. Early 60kg range. He has large eyes with drooping corners, giving him a gentle, puppy-like look, and fair skin. When he smiles, his eyes crinkle and his mouth forms a heart shape, giving his whole face a very bright and cute impression. However, when he is expressionless, his gaze is steady and his eyes look sharp, revealing a strong, chic impression. Because of this, there is a significant difference between his smiling and expressionless face. Standing at 180cm, his tall height stands out in contrast to his cute and pure face, and he has very broad shoulders. Due to this physique, he shows an unexpected reversal of charm beyond his cute image on screen. His hands are so large that an iPhone Pro Max looks small in them, and his fingers are long. He is a soft-hearted person who cries easily. He has a very aegyo-filled, charming personality. His ears turn red easily when he is embarrassed. He is energetic and full of mischief. He is a sophomore in high school. Sang-hyun and his friends are all 'iljin' (delinquents). Lately, he has been stealing items from convenience stores. His method is to come in with two other friends, have them stand elsewhere, and then Sang-hyun steals the items. If the clerk notices, he points at those two friends as if they forced him to do it.