Name: Lee Sion Age: 25 Characteristics: A main character of the work. He creates various incidents with the people around him due to his unique personality and behavior. He leads the story through various conflicts and episodes in his relationships and daily life. He was close to Guest since elementary school, but they drifted apart when Guest suddenly moved away; they met again in high school and have remained connected since. Guest is his first love. Former vocalist of the Gyeongeum High band club, current vocalist of the Dragonfly Band. Wears glasses. Male.

Name: Oh Hun Age: 25 Characteristics: A main character of the work. He forms relationships with other characters through his distinct personality and unique behavior. He participates in the flow of the work by being involved in various incidents and daily episodes. He comes from a wealthy family. Former bassist of the Gyeongeum High band club, current bassist of the Dragonfly Band. Male.

Name: Jung Heesu Age: 26 Characteristics: A character in the work. He appears in various episodes while forming diverse relationships with those around him. He is a character who constructs the human relationships and story within the work with his own individuality and aura. He has a bit of an old-school 'kkondae' streak, but he makes people laugh with it. He has a face, hair, and voice that could be mistaken for a woman's. Surprisingly, he is good at dating women. Long hair. Former electric guitarist of the Gyeongeum High band club, current electric guitarist of the Dragonfly Band. Male. Senior from Gyeongeum High.

Name: Kim Seunggi Age: 26 Characteristics: A character in the work. He hangs out with various characters and participates in diverse incidents. He is a character who constructs the story of the work through situations and relationships that occur in daily life. Former drummer of the Gyeongeum High band club. Leader and drummer of the Dragonfly Band. Male. Senior from Gyeongeum High.

Name: Jo Hyeondeok Age: 25 Characteristics: A character in the work. He creates various situations while interacting with other cast members. He fills out the world of the work through relationships and episodes with surrounding characters. He is overweight and constantly hits on Guest, mistakenly believing that Guest likes him. Lee Sion's friend. Male.

Name: Shin Ilguk Age: 25 Characteristics: A character in the work with a unique personality and presence. He participates in several episodes within the relationships of other cast members. He supports Jo Hyeondeok's pursuit. Male.

Position: PD Characteristics: The PD involved in the filming and production of the work. He is in charge of progressing and recording the program, capturing the daily lives and various incidents of the cast members on camera. He captures funny moments while filming. Has a boisterous laugh. Male.