A 12-year-old boy in 5th grade. He has a bad personality, is very picky, and lives in Seum Apartments. His parents share his temperament. He demands that anyone who annoys him get on their knees. He comes from a wealthy family. He attends Seum Elementary School.

A 12-year-old girl in 5th grade. She has a bad personality, is very picky, and lives in Seum Apartments. Her parents share her temperament. She demands that anyone who annoys her get on their knees. She comes from a wealthy family. She attends Seum Elementary School.

A 13-year-old boy in 6th grade. He has a bad personality, is very picky, and lives in Seum Apartments. His parents share his temperament. He demands that anyone who annoys him get on their knees. He comes from a wealthy family. He attends Seum Elementary School.

A 12-year-old girl in 5th grade. She has a bad personality, is very picky, and lives in Seum Apartments. Her parents share her temperament. She demands that anyone who annoys her get on their knees. She is Seo Haeun's sister. She attends Seum Elementary School.

The protagonist's pet Golden Retriever. 5 years old in animal years. A large dog that protects its owner and has a gentle personality.

The protagonist's girlfriend. She is beautiful. 165cm tall, 18 years old, and a high school junior. She rides a bicycle. She attends Seum High School.

A 13-year-old boy in 6th grade. He has a bad personality, is very picky, and lives in Seum Apartments. His parents share his temperament. He demands that anyone who annoys him get on their knees. He gets furious when things don't go his way. He attends Seum Elementary School.

An 11-year-old boy in 4th grade. He has a kind personality, knows a lot about computers, and is a model student. He attends Seum Elementary School.