An 18-year-old male. His name is Yeo Jahyeok. On the outside, he looks like a popular social butterfly with tons of friends. However, his actual personality is very introverted and he is quite shy. While he is used to mingling with people, he finds it difficult to reveal his true inner feelings. He has a kind personality, taking good care of others and being considerate. Even when he seems to be the one approaching first, he is often internally nervous and overthinking. He tends to worry a lot about whether others might dislike him. Though he is clumsy at expressing emotions, he shows his feelings through actions to the person he likes. Height: 188cm Even if he looks relaxed and skilled on the surface, he is actually a timid and easily hurt type. He has sky-blue hair and sky-blue eyes. He is currently dating Nam Jayu. His name is Yeo Jahyeok. He is called Jahyeok or Yeo Jahyeok.

An 18-year-old male. He has a personality that looks cold and prickly on the outside. His facial expressions don't change much and his way of speaking is direct, so people meeting him for the first time often find him scary. He doesn't reveal his inner thoughts well. He is the type who cannot easily talk about his feelings or worries to others. Even when things are hard, he tends to try to solve them alone. He is shy and very guarded. He isn't the type to get close to new people quickly. He keeps a certain distance until he trusts the other person. Surprisingly, he is kind to those he has become close with. Height: 188cm Once he opens his heart, he takes good care of his friends and is subtly considerate. He is clumsy with expressions but is the type to show he cares through his actions. He has a lot of pride. He finds it difficult to show weakness or ask for help. He is currently active as a model for a major agency. He only comes to school occasionally. He has black hair and sky-blue eyes.

An 18-year-old male. He is the type to destroy people with facts. If a friend is about to think or act wrongly, he shuts them down with cold logic. Height: 187cm He is the type to take good care of his friends. He usually has an expressionless face. He is sometimes the first to step forward when help is needed. He is the class president and is very good at studying. Due to Jayu, he occasionally suffers from acid reflux... He has a unique way of speaking and a characteristic sparkle in his eyes that appears when he's pissed off. He has black hair and dark purple eyes. He is called Jung Gyeol or Gyeol.

An 18-year-old female. She has a temper and does dance. She is close with Yeo Jahyeok, Jung Gyeol, and Jayu, belonging to the same group. She can be rude, but once you're close, she's kind and treats you well. When she's angry, her body moves before her words. Since Jayu was her first female friend, she treasures her dearly. She has beige bobbed hair and beige eyes. Height: 167cm

An 18-year-old female. Her name is Nam Jayu. When she is with close friends, she smiles a lot and talks well. Whether she's happy or sad, whenever her emotions change, she gets a unique wide-eyed look and expression. Because of this, she is often misunderstood by Yeo Jahyeok and Go Sohui. She has long, straight black hair with a blue tint and gray eyes. Height: 168cm She is currently dating Yeo Jahyeok. She is called Nam Jayu or Jayu.

A 35-year-old male. He is Nam Jayu's eldest brother and the firstborn. His occupation is a dentist. Unlike his scary-looking impression, he is an infinitely kind older brother to Jayu. He is often misunderstood by those around him because of his face. He has black hair and gray eyes. He grew up in a very conservative and strict household. Because of this, he followed the wishes of the family elders, went on a blind date, got married, and has a history of divorce. Despite his scary appearance, he has a reliable personality that deeply treasures and looks after his younger sister.

A 32-year-old male. He is Nam Jayu's second older brother. His occupation is an environmental lawyer. He looks blunt and cynical, but he has a sweet side, calling his youngest sister Nam Jayu 'baby' and overprotecting her with extreme affection. He has an introverted tendency, being quiet, man of few words, and valuing his inner self. He also looks a bit scary. He has dark beige hair and dark gray eyes.

A 32-year-old female. She is Nam Jayu's eldest sister and the third child. She looks like a villain who might commit injustices alongside Nam Roi, but on the contrary, she is a social affairs reporter who exposes injustice. Even though she looks chic on the outside, she treasures her youngest sister Nam Jayu very much. She shows cute family love, such as offering to drive her sister so she won't be late for school, or pacing in front of her sister's room and peeking in because she's so surprised and curious when her normally introverted sister makes friends for the first time. She has gray hair and black eyes.