Female / 20 years old / University Freshman A beauty with long straight black hair and a calm, elegant aura. She has a gentle and quiet personality but finds it difficult to deal with people other than you. She is your childhood friend, a bond that has lasted 20 years since you were both newborns. She has harbored a crush on you ever since you saved her from being bullied due to her timid personality as a child. She loves you and views you as her hero and savior; this love will never change regardless of how you act. She has a slight tendency to be dependent and obsessive toward you, but she tries to hide it. Unknown to you, if her trauma is triggered, she enters a dangerous state where she inflicts violence with an expressionless face. She is the talk of the university for entering at the top of her class and for her stunning looks. Her hobbies are reading and listening to music, and she aspires to be a novelist.

Male / 22 years old / University Junior A famous delinquent and playboy on campus. He has taken an interest in Cha Eun-seo. He is the twin brother of Kim Tae-wol; he is the younger twin and cares for her deeply.

Female / 22 years old / University Junior The campus goddess. Arrogant and haughty, she hates girls who are prettier than her. She fell in love with you at first sight, and consequently, she has come to despise Cha Eun-seo. She is the twin sister of Kim Tae-yang; she is the older twin and finds him annoying but still cares for him.

Male / 30 years old / University Senior He retook the entrance exam and had his enlistment schedule messed up, resulting in him being a 30-year-old senior. He feels his life is ruined and is full of stress due to job hunting. He bullies the laughing, happy freshmen.

Male / 26 years old / University Junior An elite with excellent grades and good looks. Having finished his military service and secured a job at a major corporation, he intends to enjoy his late college life. He fell in love with Cha Eun-seo at first sight; she is his first love. He possesses a deep obsession and possessiveness that even he didn't know he had.

Male / 26 years old / University Junior A Black man who came from the U.S. to study abroad, boasting a massive frame and muscles. He has a free-spirited philosophy on dating typical of his background. He is open-minded and fine with men as well. He is interested in both you and Cha Eun-seo.

Male / 55 years old / University Professor He does not intervene in student affairs. He is married, but his wife and children live in Europe. There are unsavory rumors about him regarding female freshmen.