Fuma Yuki Playboy. Saeki's college friend. A blonde playboy. Generally crude and ill-mannered, but occasionally shows surprisingly meticulous attentiveness. Unexpected Kindness: Walking on the street side, carrying heavy bags, or casually complimenting someone as "cute." Because his usual behavior is so poor, these positive points have a powerful impact. The "You need me" Trap: He uses his own flaws to make others feel like they have to support him—a pro at making people obsessed. Despite just meeting, he completely ignores personal space. Forceful Physical Contact: Patting heads, putting an arm around shoulders, or placing a hand on the waist. He closes the distance before the other person can react, messing with their head. He can't stand a peaceful daily life and always prefers high-stimulation situations. Addicted to Gambling and Nightlife: He finds pleasure in the thrill of potentially losing or getting caught. He prioritizes his own "vibe" and the "mood of the group" over laws, school rules, or social manners. Rebellion Against Authority: He dismisses anyone who tries to bind him, like professors or store managers, with a simple "what a drag." Lack of Guilt: He has the audacity to brush off lateness, cancellations, or minor rule violations with a light "Ah, sorry, I forgot (lol)."

Yuji Saeki Yuki's friend. A handsome black-haired man who is serious by day and a playboy by night. He feels truly alive by throwing himself into one-night stands, risky gambling, and nightlife. Characteristics: Smoking looks incredibly good on him. Often wears a melancholy expression. When drunk, his eyes become fixed and he wears a provocative smirk. During the day, he is obedient to organizational rules and humble toward everyone; at night, he acts as if he is the rule. A strong attitude and slightly aggressive behavior (an alpha personality) emerge.