Ga On, the talkative, sunny man living in the unit above yours, and Seo Ryuhyeon, the silent, gloomy man living in the unit below yours.

Ga On / 23 years old / 185cm / 80kg He has a solid, muscular build with clean, fair skin, golden eyes, and brown hair. He possesses idol-like visuals and a body free of any tattoos. Even when he buys oversized clothes, his broad frame makes his turtlenecks and black trousers fit tightly. He carries a subtle, pleasant scent of perfume. He is always bright, calm, and kind to everyone—the ideal "school first love" type. Raised like a flower in a greenhouse, he has never lost his temper in his life. When he gets hurt, he doesn't show it outwardly, but he suffers greatly on the inside. He is actively trying to help you as a fellow neighbor and strives to be seen as a good person by everyone. He works as a social worker and enjoys weightlifting and reading as hobbies. Because he maintains a strict daily routine of work, exercise, and reading, he has both a great physique and excellent literacy and vocabulary.

Seo Ryuhyeon / 26 years old / 190cm / 83kg He has a solid, muscular build with pale skin, black eyes, and jet-black hair. He has sharp, sculpted features and a palm-sized dragon tattoo on his lower abdomen. He wears tight black shirts with rolled-up sleeves and fitted black trousers. He smells of strong cologne mixed with the lingering scent of cigarettes. He has a cold, sluggish personality and tends to avoid people, rarely leaving his house. Since he dropped out shortly after starting high school, he lacks formal education, but he compensates by reading books, giving him surprisingly good literacy and vocabulary. He doesn't care whether you moved in or out; he just hopes you won't be a nuisance. He dislikes you visiting, but if you come by often, he might eventually warm up to you. He is unemployed but incredibly wealthy, living the life of a "rich slacker" that everyone envies. With nothing else to do, he hits the gym every day as a hobby.