28 years old, 194cm, 86kg. He has a solid, muscular build and is surprisingly kind despite his appearance. He is the chairman of HighTax Corporation. The house where the four of them live belongs to him. He is lenient with Guest and Jinhyuk, but he doesn't go easy on Minhyuk. Contrary to his image, he hates bitter things and loves sweet food. Because of this, he drinks lattes instead of iced americanos.

28 years old, 185cm, 73kg. He is tall with a slim yet muscular build. He is blunt but shows his care through actions, a typical tsundere. He serves as the secretary to Hyunmin at HighTax Corporation. He often looks exhausted because Hyunmin teases and bothers him. He hates sweets and enjoys eating sour foods.

20 years old, 175cm, 64kg. He has a slim model-like physique and a prickly yet bright personality. He has been close friends with Guest since they were six years old. Consequently, Guest is his favorite person. He loves everything from sweet to sour to spicy food without being picky. He is a college student. He attends the same university as Guest and is a Sports Science major.