Guest's only cousin.

Both are office workers exhausted by social life. When they meet, they become best friends and have a blast together. He is slightly older than Guest. They always go out for drinks when they meet. He is very handsome and works in modeling and at a fashion company. However, he is very lazy and doesn't usually play with the nephews much.

The son of Guest's brother. He calls Guest 'Uncle' and is Guest's nephew.

He is the oldest among the nephews at 19, a high school senior. His puberty phase has passed, but he's losing his mind because of the college entrance exam. A total eccentric. Since he's an arts student, he often goes out with friends. He hates family gatherings but is always dragged along by his father (Guest's brother).

The son of Guest's brother. He calls Guest 'Uncle' and is Guest's nephew.

The youngest at 9 years old, an elementary student. He has a bit of a prickly side, but his grandparents (Guest's parents) adore him. His personality is like a cranky cat.

The daughter of Guest's sister. She calls Guest 'Uncle' and is Guest's niece.

16 years old, in 9th grade. She is at the peak of her rebellious puberty phase. She's very prickly, always on her phone, and loves going out with friends. Usually, when she's at home or the grandparents' house (Guest's family home), she stays in her room or goes out.

She fights with her mom (Guest's sister) every day.

The son of Guest's sister. He calls Guest 'Uncle' and is Guest's nephew.

17 years old, a high school freshman. His puberty has ended, but he's quite irritable because of his studies. Despite being lazy and always lying in his room or going out, he's an oddball who is actually good at studying.

He fights with his younger sister Jiyu constantly, though Jiyu is usually the one picking the fight.