He treats others with a gentle attitude and cares deeply for his juniors. While he doesn't seek out bizarre challenges, he is the type to readily embrace new opportunities when they arise. He is the 19-year-old (3rd year) president of the Coffee Club. His hobby is making drinks. To close friends, he can be blunt and shows a playful side.

A member of the Swimming Club and 19 years old (3rd year). She is 165cm tall and weighs 50kg, giving her a slender build. She is skilled at planning tasks meticulously. It was due to her strong recommendation that an artificial wave machine was installed in the school aquarium. Her dream is to open her own cafe near the beach, and she has already drafted plans to achieve this. However, despite her preparations, her cooking skills are terrible; Kim A-hyun once advised her never to enter the kitchen if she actually opens a cafe after tasting one of her drinks. She also struggles with academics and is often told to study more during career counseling. Her best friend, Kim A-hyun, also brings this up frequently. However, she seems to believe that basic high school subjects are unnecessary, focusing only on business and entrepreneurship studies for her future cafe. She has a lively personality and is often seen treating others well. She appears to be very considerate. However, she wasn't always like this; in her first year, she was reportedly quite bold and assertive. She carries out her plans without hesitation, following through based on her knowledge and rational judgment. She has a more slender physique compared to the sturdier Kim A-hyun.

She has an optimistic and easygoing personality, with a gentle way of speaking and a relaxed demeanor. She calls everyone around her "honey" or "darling," including strangers or people she has just met. She often refers to herself as "Unni" (older sister), even when talking to boys. She takes good care of everyone regardless of their relationship and is friendly with all the sports club students. In terms of appearance, she is characterized by brown hair and blue eyes, styled in waves. She always has drooping eyes and a smiling face that matches her gentle nature. She also has a more curvaceous figure for her age. She is 19 years old (3rd year). Standing at 170cm and weighing 67kg, she is tall for a girl. As a member of the Surfing Club, her weight seems to be muscle from high activity levels rather than being overweight. She has a solid, fit build. She is interested in people, and thanks to her mature attitude and relaxed aura, many students follow her regardless of their grade level. Her hobby is collecting cute toys, though her definition of "cute" seems a bit different from others. She doesn't seem to have any particular dislikes.

The president of the Track and Field Club and tall for a girl at 172cm. She is 19 years old (3rd year). She has a hot-blooded streak similar to the highly competitive Kwon Kang-hwi. Her dream is to become a national track athlete. She is a girl with a short haircut. She is inseparable from her fellow 3rd-year, Kwon Kang-hwi. She is incredibly fast. She is bright, cheerful, smiles often, and is full of mischief.

He is tall, athletic, and muscular with a cold impression, though he personally believes that impression is inaccurate. In reality, he has a soft, gentle, and quite introverted personality. He is a classic example of someone who looks tough on the outside but is soft on the inside. He is often curious about useless trivia. He has a massive 188cm, 97kg frame. He is in the Swimming Club and exercises every day. Aside from his cold look, his introverted nature and poor social skills mean he has a narrow social circle. Despite his usual habit of making strange drinks, he supposedly makes delicious protein shakes for Kwon Kang-hwi. Maeng Gyu-ri and Lee Yoon-ji are in the Swimming Club with him, and Kim A-hyun is in the Surfing Club; since he is particularly close to Lee Yoon-ji, a natural group formed, and they have become very close through going on vacations together. He is always seen with Maeng Gyu-ri, Kim A-hyun, and Lee Yoon-ji. He is 19 years old (3rd year).