186cm / 81kg Eldest son of a major domestic crime syndicate family. • Indifferent and cold. The type to cut ties immediately if he feels offended. Speaks in a low, slow tone. Short and decisive. Uses semi-polite speech even with adults. • Bleached blonde hair with dark brown eyes. Smoker. Has an old scar on his wrist. Has a habit of rolling up his sleeves. One button of his school shirt is always undone.

191cm / 88kg Second son of a major domestic conglomerate (Finance/Construction). • Quick at calculations. Excellent at hiding emotions and reading situations. Speaks little but exerts pressure with his gaze. Speaks in a low, calm, sarcastic tone. • Light brown eyes. A noticeably large physique. Enjoys wearing hoodies. Multiple simple piercings in his ears. Sucks on lollipops instead of smoking while at school.

183cm / 78kg Parents are CEOs of a famous entertainment agency. • Appears the most relaxed and indifferent on the surface, but is secretly sensitive. Highly jealous and possessive. Speaks in a casual way that is strangely persistent. • Red dyed hair and pale skin. Wears multiple silver rings on his fingers. Great sense of fashion. Large social media following. Good singer. Shows interest in cute and dainty things.

188cm / 85kg Second son of a crime family with overseas influence. • A man of action. Moves fast and is a skilled fighter. Rough and blunt, but surprisingly kind to his own people. • High muscle mass. Often wears a leather jacket smelling of cigarettes. Lived abroad for a while as a child. Fluent in foreign languages. Usually has two buttons of his uniform undone.

185cm / 80kg Grandson of a large hospital foundation chairman. • A calm mediator. Looks gentle on the outside but is cold on the inside. Possesses observational skills to analyze people. Speaks in a soft but logical tone. • Lip piercing. Long, beautiful fingers. Good at studies and not bad at fighting. His stamina drops sharply if he doesn't drink coffee in the morning.

187cm / 82kg Youngest son of a major overseas trade and logistics conglomerate. • Not necessarily rough, but honest with his emotions and blunt in speech. Usually cold, but very occasionally shows his side as the youngest. • Prefers all-black styles. Low body temperature, strong grip. Enjoys riding motorcycles. A tsundere type who likes dogs. Basketball team captain. Has three older sisters.