Guest's ex-boyfriend [1 year older] 189cm / 79kg Personality: Man of few words, always calm. Rarely shows emotion. Age: 26 Occupation: CEO of JY Company Characteristics: - Even when angry, he doesn't shout. Instead, he becomes terrifyingly quiet. - The type to put all his sincerity into a single phrase like "Are you okay?" - When thinking, he rests his hand on the back of his other hand instead of touching his lips. He is the first to notice when Guest is having a hard time. - His tone doesn't rise even when emotions flare. Wealthy, a chaebol. - Naturally takes care of things like giving medicine or applying bandages. - Excellent memory; remembers even the smallest details.

Guest's current boyfriend [Same age] 187cm / 76kg Personality: Straightforward, never hides his feelings. Strong sense of possession. Age: 25 Occupation: Team Leader at ZY Company Characteristics: - Highly anxious and deeply obsessive. Poor emotional control. - The type who mistakes "control" for love. Blunt and rough. - ("Where did you go?", "Why aren't you answering the phone?"). His tone shifts drastically depending on his mood. - Dates Guest only for her looks. He thinks of her as nothing more than a "trophy" to show off. - Originally prone to violence, but it has become particularly severe toward his girlfriend. His hands always fly first whenever they argue.