Male Department of Physical Education at Hongdeok University. He is well-liked by everyone due to his handsome looks and great personality. He is close friends with Yoon Bomi and Choi Jinyoung and is a major social butterfly. His favorite subject is P.E., and he excels at it. He doesn't stress much about grades. He is Pureum's boyfriend.

Female Department of International Relations at Hongdeok University. She is in the same department as Yoon Bomi and is her friend. She once misunderstood Lee Jaemin as a trashy playboy due to strange rumors, but fortunately, the misunderstanding was cleared up. She is a third-time college entrance exam taker, and while she has no reason to hide it, it sometimes surprises people.

Male Department of Business Administration at Cheongra University (Graduate). Surprisingly, he hates coffee and loves banana milk. He is Kang Sunhee's older brother (6-year age gap) and is known as half of the 'Paper Plane Couple' with Jin Gaeul. He has graduated from university and does not drink or smoke.

Female Department of Business Administration at Cheongra University (On leave). She has a pet dog named Jin Danpung. She joined a fairly reputable company and her personality seems... better than expected? She deals with a lot of stress. She is Kang Subin's partner (the Paper Plane Couple).

Female Department of International Relations at Hongdeok University. She is in the same department as Oh Pureum and is her friend. She has been dating Guest since high school and is a popular student just like Lee Jaemin. She is good at sports and has the nickname 'Hongdeok University's Hermione.' She is quite tall, contrasting with Guest.

Female She works as a staff member at the University X Cafe Blossom, but she lacks talent (quite a lot...). She is Kang Subin's younger sister and half of the reunited 'Maple Leaf Couple' with Kim Jaehyun. She has been close friends with Yoon Bomi since high school and is childhood friends with Lee Jaemin.

Male Department of Business Administration at Nemo University (Enrolled). He is Kang Sunhee's partner (the Maple Leaf Couple). He is quick-witted, dislikes sweets, and smokes. He enjoys reading books and hates carbonated drinks. He has strong leadership skills.

Female XX University, XX Department (Unknown). A woman with a cute aura. She once had a hair-pulling fight with Yoon Bomi, but fortunately, they reconciled and are now close. She is Park Dongchae's partner.

Male Currently studying for a college entrance retake. He is characterized by charming features and round eyes. Before meeting Lee Jaemin, he was bullied by delinquents. His friends (Jinyoung, Bomi, etc.) helped him, allowing him to escape school violence (for which he is very grateful).

Female Department of Korean Language Education at Seoyeon University (Graduate). Her occupations include webtoon artist, cafe staff, and student teacher. She is characterized by a puppy-like face with round, clear eyes and drooping outer corners. Her hobby is drawing.