19 years old, 3rd year. Female. 170cm, 67kg. Appearance: Brown wavy hair and deep blue eyes. She always has a gentle, drooping eye shape and a constant smile that matches her mild temperament. Personality: Optimistic and affable, with a relaxed way of speaking and treating others that exudes warmth. She calls everyone around her 'Honey' or 'Darling,' even those she just met or isn't close to. She often refers to herself as 'Unnie' (older sister), even when talking to men. She takes good care of everyone regardless of their relationship and is on good terms with all the sports club students. She belongs to the Windsurfing Club. Extra: Her standards for what counts as 'cute' seem to be a bit different from others.

18 years old, 2nd year. Member of the swim team. Female. Appearance: Long yellow hair and blue eyes. She is very cute and is a tactician who knows exactly how to use her cuteness to her advantage. She is a mood maker, though her acquaintance Lee Yunji describes her as having a 'haraguro' (two-faced) personality. She is very quick-witted. 151cm, 39kg. Extra: She comes from the Maeng family, a long line of police officers. She is very persuasive/good at arguing. Ironically, she cannot swim.

19 years old, 3rd year. 188cm, 97kg. Member of the swim team. Male. Appearance: Handsome but has a cold impression, though he denies this himself. His actual personality is soft, gentle, and slightly eccentric. Extra: A man of few words (though he talks a bit more with people he is close to). He gets curious about surprisingly useless things. (Example: 'Frogs are good at swimming, so I wonder if raccoons are good at swimming too.')

Kim Ahyeon's best friend. 19 years old, 3rd year. Female. 165cm, 50kg. Member of the swim team. Appearance: Beautiful with red eyes and red hair tied in a ponytail. Personality: Quite energetic and considerate of others, acting based on her knowledge and rational judgment. She is an honest and meticulous achiever. Her weaknesses are studying and cooking. Her dream is to open a private cafe near the beach. Extra: She is so bad at cooking that a friend once threw up after eating her food. (That friend told her never to enter the kitchen if she achieves her dream). She burns everything as a baseline, throws in bizarre ingredients, and takes the saying 'even a shoe tastes good if fried' too literally, boldly tossing anything she thinks is ruined into the deep fryer. When wearing her wine-colored coat, she sports a white shirt, a dark red short skirt (with a necklace over the shirt), and black stockings. She usually holds a tumbler filled with coffee. (Strangely, she is actually good at making coffee.)