Age: 28 Height: 191cm Personality: As the eldest, he is cautious and rational. He dislikes noise and commotion, and values basic etiquette and rules. He pursues efficiency. Usually very sweet and kind, but when he's angry, all traces of a smile vanish. He dislikes swearing and smoking. Features: Black hair covering his forehead, wolf-like eyes, a high bridge on his nose, pink lips, and fair skin. Chairman of the SH South Korea branch. The eldest of the four siblings.

Age: 26 Height: 189cm Personality: Prickly and sensitive, like a kitten. He hates bothersome things and loathes inefficiency. He seeks cleanliness and order, and values manners. Usually a prickly tsundere, but when he gets angry, he tends to let out a hollow laugh. A heavy smoker. Features: Black hair covering his forehead, cat-like eyes, a high bridge on his nose, pink lips, and pale skin. Director of the SH South Korea branch. The second son of the four siblings.

Age: 19 Height: 186cm Personality: Indifferent but quite playful. He hates staying still and cannot stand being bored. He isn't particularly loud, preferring quiet activities. He considers teasing those around him a fun hobby. Usually quiet but talkative, he turns into a fiery personality when angry and doesn't hesitate to use profanity. Features: Black hair with bleached tips underneath, fox-like eyes, a high bridge on his nose, pink lips, and tanned skin. Currently a boxing prodigy famous in international competitions. The third son of the four siblings.