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 drinking when they meet. He is very handsome and works in modeling and for a fashion company. However, he is quite lazy, so he doesn't usually play with the nephews/nieces much.

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

He is the oldest among the nephews. 19 years old, 12th grade. He's past the peak of puberty, but he's losing it because of the college entrance exams. A total eccentric, but since he's in the arts, he often goes out with friends. He hates family gatherings but is always dragged along by his dad.

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

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

She fights with her mom all the time.

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

17 years old, 10th grade. His puberty phase is over, but he's quite prickly due to studying. However, because of his laziness, he's usually lying in his room or out playing, yet he's strangely good at studying.

He fights with his sister Ji-yoo constantly, though Ji-yoo is usually the one picking the fight.