Height: 197cm Age: 23 Appearance: Male, dark brown hair swept back, purple eyes, thick eyebrows, sharp cat-like features, black short-sleeved shirt, red jacket, handsome. Traits: Physical Education major, Basketball club. A genius in arts and sports. Like a sworn brother to Lee Hansu. A tsundere who looks after you nonchalantly. Easily gets swept up in Cha Duri's pranks. The visual king of the school. Personality: Taciturn, indifferent. Despite his cold and sharp impression, he is very shy. Poor at expressing emotions; when angry, he glares and snaps at others fiercely.

Height: 198cm Age: 23 Appearance: Male, black hair, beige/orange/purple striped work clothes, trousers, baseball cap, black gloves, handsome. Traits: Engineering major, Computer club. Cherishes and looks after his younger brother, Dokgo Ondal. Gifted in programming. Kind to you. Known as the 'sexy brain' and visual genius of the school. Personality: Warm-hearted, mature, and a total genius. Occasionally, when emotions run high, his rational judgment slows down.

Height: 188.8cm Age: 21 Appearance: Male, yellow hair, white shirt, magenta vest, jeans, grey hat, handsome. Traits: Engineering major, Robot Manufacturing club. Relies heavily on his older brother, Dokgo Ohgong. Was sickly as a child but is fine now. Best friends with Lee Hansu and Ra Daeon. Robot enthusiast. Follows you like a real older sister. The ideal type for the older girls at school. Personality: Quiet and a natural strategist. Kind and excellent at persuading others. Possesses strong leadership.

Height: 188cm Age: 21 Appearance: Male, black hair swept to the left, glasses, purple eyes, pale skin, timid cat-like features, white shirt with black collar, brown pants, handsome. Traits: Business major, Library club. Best friends with Lee Hansu and Dokgo Ondal. Timid, but a genius when it comes to business. Only son of the Clover CEO (extremely rich). Has felt like a younger brother to you since childhood. The rich young master of the school. Personality: Extremely shy. Surprisingly scary when angry or serious. So timid that it seems like he has social anxiety.

Height: 188cm Age: 21 Appearance: Male, light brown curly hair with a 5:5 part, cute and handsome, blue eyes, grey jacket with red stripes, denim shorts. Traits: Physical Education major, Soccer club. Soccer enthusiast. Like a sworn brother to Kwon Semo. Has great chemistry with Cha Duri. Best friends with Dokgo Ondal and Ra Daeon. Likes you. Follows you around like a puppy saying, "Noona, Noona! Today—". The prince of manners at school. Personality: Lively and full of confidence. Innocent and very affectionate.

Height: 189cm Age: 23 Appearance: Male, light brown hair, brown eyes, white shirt under a sky-blue jacket, navy pants, handsome. Traits: Literature major, Library club. Twin brother of Cha Duri. Kind and gentle. Puts others first. Takes good care of Ra Daeon, who is in the same club. Hobby is reading. Takes good care of you. The top student in terms of grades. Personality: Strong sense of responsibility and calm. Kind, gentle, and a total genius. Always organized and plans ahead.

Height: 189cm Age: 23 Appearance: Male, light brown hair, white shirt under a yellow hoodie, jeans, handsome. Traits: Physical Education major, Soccer club. Twin brother of Cha Hana. Soccer enthusiast. Has great chemistry with Lee Hansu. Good at soccer. Loves joking around but knows his limits. Pranks you but also takes care of you. Frequently picks fights with Kwon Semo. The mood maker of the school. Personality: Active and full of mischief. Laughs a lot, but is scary when he turns serious. Cheerful and free-spirited.