The eldest son of the Jung family, 20 years old. Black short hair, black eyes (despite his bizarre behavior, he is said to be the most handsome man in the world... 187cm tall). A student in the Department of Electrophysics at Thunder University and a member of the Student Council. He possesses a mental world that transcends the fourth dimension and resides somewhere near Andromeda; nothing he does is surprising. He never thinks even a single step ahead. Though he is eccentric and frequently teases those around him, he is actually a genius with a national treasure-level brain. He is playful in every situation. He has some otaku-like tendencies. Likes: Games, robots, being home alone, bikinis, aliens, Bruce Lee (he wears a matching yellow tracksuit), ice cream, crisp cash. Hobbies: Playing around, tea time, inventing, gaming.

The second child of the Jung family, 17 years old. Short black pigtails, black eyes. A student at Juljul Girls' High School. Hobbies: Fangirling over boy groups, collecting cosmetics and merchandise, eating. Likes: Nam Hoon, eating, friends, allowance, male idols. She loves eating and is incredibly strong (appears to be overweight). She is very poor at studying but is Nam Hoon's girlfriend (a lovey-dovey couple). While Shin causes trouble for pure amusement, she tends to cause it out of sheer stupidity. She is close friends with Il-deung and Dae Bak-sun.

The head of the Jung family, 48 years old. Black short hair, black eyes, thick eyebrows, light stubble. Hobbies: Go-Stop (card game), tea time, running a sentimental blog. Likes: Sleeping, family, watches, blogging, alcohol, karaoke, home shopping, the Pigeons (baseball team). Kind-hearted and soft-spoken, he is the most normal member of the family. Though timid, he is the epitome of a great father who works tirelessly for his children. However, due to his pushover personality, he gets nagged a lot at work and seems to be at the bottom of the family hierarchy. He is easily frightened.

The mother of the Jung family, a housewife in her 40s. Short orange ponytail, black eyes. Hobbies: Interior design, saving money, watching dramas, hair styling. Likes: Family, cosmetics, dramas, money! Secret: She was once a legendary killer known as 'Black Rose.' Extremely powerful, she is the strongest character in this universe. She is more of a leader than Mr. Jung, ruling and protecting the household (a total alpha female). However, she has now put her past behind her and become a reliable mother.

Juri's friend, 17 years old. Ranked 1st in the nation academically and has a crush on Shin. She is highly intelligent and has a relatively normal personality, but she has zero luck in romance. She dislikes Alice. Black short hair, glasses.

Juri's friend, 17 years old. Ordinary but extremely lucky and wealthy. She occasionally shows a 4D personality but is mostly normal. Catchphrase: "Daebak" (Awesome). She is Dae Deok-hu's younger sister (they get along well). Black bob cut, black eyes.

Juri's boyfriend, 19 years old. Black regent hair, black eyes. He is quite handsome and loves Juri immensely (totally blinded by love). The most normal person in the cast. Basically a kind, diligent, and exemplary student. He doesn't seem to like the 'Fat Five' very much. A devoted son. He is just Juri's boyfriend and not a member of the Jung family.

The successor to the Thunder Group, in her 20s. Long wavy blonde hair, blue eyes. She likes Shin. She might seem obnoxious and stuck-up, but she's actually just a rich girl who knows nothing about the real world (raised spoiled by her grandfather, which makes her prideful). However, she is soft-hearted and quite kind deep down.

20 years old. Grey bob cut, swirl glasses, acne, and obese. A massive otaku (obsessed with Magical Girl Nene-chan). He is Shin's friend. He has great manners and is so kind that he boasts a wide social circle regardless of gender or affiliation (a total social butterfly). He ends every sentence with "-neung." He is kind-hearted. He is Dae Bak-sun's older brother (they get along well).

7 years old. Yellow short hair (perm roll bangs), black eyes, buck teeth. A very bright and innocent boy. Pure and naive but a huge troublemaker. He lives with the Jung family. He doesn't seem to have a great sense of hygiene...