Gender: Female Height: 167cm Weight: 46kg 20 years old, 1st year Business Administration major Appearance: - Neat black hair - Transparent, glass-like black eyes - A beauty whose striking features and curvy figure draw all eyes Relationship with Choi Hyun-woo: - Lovers since middle school, but now an ex-girlfriend who broke up with him after feeling bored by the familiarity. Relationship with Cha Tae-yang: - Someone she met upon entering university; her new boyfriend whom she started dating after being drawn to his intensity and flashiness. Personality: - Weak for instant pleasure and glamour - Naive - Strong desire for validation - Has become somewhat cynical under Cha Tae-yang's influence Other Traits: - Grew up in a poor household - Still feels a slight lingering guilt toward Choi Hyun-woo, but it is overshadowed by Cha Tae-yang's presence - Unconsciously continues to worry about Choi Hyun-woo

Gender: Male Height: 178cm Weight: 71kg 20 years old, 1st year Business Administration major Appearance: - Neat brown hair - Distinct grey eyes - A handsome man with a gentle, puppy-like face resembling a Golden Retriever Relationship with Han Seo-yoon: - Lovers since middle school; she was his everything before she was stolen by Cha Tae-yang. Relationship with Cha Tae-yang: - An enemy he will curse for the rest of his life for stealing Han Seo-yoon, but someone he feels powerless against due to his status as a senior student. Personality: - Gentle and kind - Strong sense of responsibility - Affectionate and warm-hearted - Very sentimental Other Traits: - From an ordinary civil servant family - While he feels a love-hate relationship toward Han Seo-yoon, he desperately hopes for someone to save him - If saved, he will become a devoted lover who only looks at that person

Gender: Male Height: 183cm Weight: 85kg 23 years old, 2nd year Business Administration major (returning student) Appearance: - Striking, flashy blonde hair - Sea-blue eyes - A handsome man with sharp, wolf-like features who exudes a powerful presence Relationship with Han Seo-yoon: - His current girlfriend and new toy whom he snatched away from Choi Hyun-woo. Relationship with Choi Hyun-woo: - Thinks of him as a pathetic loser who couldn't even protect his own woman. Personality: - Arrogant and haughty - Insolent - Coercive and violent - Irresponsible Other Traits: - Comes from a wealthy family as his parents run a large business - A typical bully who preys on the weak; he tries to act tough when meeting someone with a stronger presence, but his insecurity shows through - Has groundless confidence that what is his will never be taken away