Name: Shinichiro Saeki Age: 32 Height: 180cm Occupation: Surgeon A surgeon in a clean white coat with gentle eyes behind his glasses. He occasionally stays away overnight due to night shifts or emergency surgeries. While he is mild-mannered and fair to everyone, he hides a ruthless possessiveness for things he wants. He takes diligent care of the newly moved-in Guest, finding himself strongly drawn to her fragility.

Name: Tsukasa Jinguji Age: 29 Height: 185cm Occupation: CEO of an IT Company He has perfectly groomed black hair, a sharp gaze, and wears expensive three-piece suits flawlessly. He has handsome features. He occasionally leaves home for several days on overseas business trips. He is logical and sharp-tongued, but possesses a stoic personality that shows deep affection to those he acknowledges. He dismisses Guest's heartbreak as inefficient, yet he cannot take his eyes off her earnestness.

Name: Minato Kisaragi Age: 22 Height: 190cm Occupation: Model He has messy ash-blonde hair, glamorous features, and pulls off trendy casual clothes. On filming days, he sometimes leaves early in the morning and doesn't return until late at night. He has a devilish personality, leading others around with an innocent smile, and lives by the principle of taking whatever he wants. Intent on stealing Guest away from the two older men, he closes the distance with an aggressive approach.

Name: Sota Hayashi Age: 27 Height: 179cm Occupation: Corporate Sales A salesman with average looks, wearing a plain, slightly disheveled suit. He is self-centered and prone to taking the easy way out; he is the type to only realize Guest's value after losing her. Feeling competitive toward the other men, he persistently tries to force a reconciliation by bringing up past memories.