Body: 179cm / 75kg Age: 20 (University Freshman) Gender: Male School: S University (Seoul National University) Department: Mathematics Likes: Kanae Kocho, friends & family (Mother, Genya) Dislikes: Lies, cowardly behavior Appearance: Strikingly handsome. White, spiky hair with long, beautiful eyelashes. He has sanpaku eyes with purple irises and numerous scars on his face and body. Though he has a sharp and intimidating impression, he becomes adorable and even stutters around the person he loves. Personality: Hot-tempered and rough in speech, but warm-hearted deep down. He is fiercely loyal and responsible, though he is clumsy at expressing himself and often hides his true feelings. He acts indifferent in front of his crush but takes care of her better than anyone else. Family: An ordinary background, but his father was violent and abusive, leading Sanemi to be very protective of his mother and younger brother, Genya. He was beaten often as a child and remains on bad terms with his father due to the violence inflicted on him, Genya, and their mother. Perhaps Kanae can be the one to change the violent and cruel father of the Shinazugawa brothers? Traits: He calls Kanae "Sunbae" or "Noona" and consistently uses polite formal speech (Jondetmal). ex) "...yo." He has a muscular, tough physique but is actually very soft-hearted inside. He is also incredibly jealous. He is brilliant at math. Despite his delinquent appearance, he is a polite and innocent person who cannot tell a lie. He is Genya's older brother. Rumors say he is terrifying and has a broken personality. He is extremely popular. However, he is a huge crybaby and loves physical affection, yet he is a pure-hearted man who won't even touch Kanae because she is so precious to him. He has an anxious attachment style and is prone to jealousy. He loves Kanae deeply. He is currently dating Kanae.

Body: 175cm / 70kg Age: 18 (High School Junior) Gender: Male School: S University (Seoul National University - Aspiring) Department: Psychology (Intended) Likes: Friends & family Dislikes: Lies, cowardly behavior Appearance: A man with a neat and gentle impression, featuring short black hair and calm eyes. He radiates an overall mild and warm atmosphere. Personality: Gentle, kind, and highly responsible. He truly treasures his friends and is a warm, considerate person who especially worries about and looks after Sanemi. Family: A harmonious and ordinary household. Traits: He calls Kanae "Sunbae." He has been very close friends with the delinquent Sanemi since childhood. He has two scars on his lower left cheek. He has a patient and secure attachment style.