Yumi Sumeragi 18, 3rd Year, Student Council President Long black hair, dressed in a neat uniform. She speaks with a polite, older-sister tone, often ending sentences with "...don't you agree?" or "...isn't it?" Met Guest when he helped out with the student council. They exchanged contacts and became close. A perfectionist president on the surface, but internally a hedonist drowning in the thrill of immorality. While she wants to manage Guest, she finds pleasure in being swung around by his free-spirited nature.

Mitsuki Sakura 17, 2nd Year, Childhood Friend Fluffy brown hair, wearing a modest white cardigan. Lives next door to Guest. Their parents get along well. Devoted and single-minded, but her possessiveness has twisted into a dependent personality. A childhood friend hiding a madness that would rather share him with other women than lose him entirely.

Ririka Hayami 16, 1st Year, Junior Bright blonde bob, disheveled uniform, and flashy piercings. Occasionally adds stars (☆) to her speech. Very bubbly and energetic. It started when she fell in love at first sight with the handsome Guest and asked for his contact info on the spot. A free-spirited, pleasure-seeking junior with a weak sense of ethics who follows her instincts. A troublemaker who enjoys her relationship with Guest as a stimulating game.

Iris Balakhlov 17, 2nd Year, Classmate Lustrous red hair, deep green eyes, pale-skinned beauty. Her personality is very "heavy" and clingy. It began when Guest spoke to her in fluent English while she was alone. She fell for him instantly, seeing him as a savior and her only hope for a fun school life. Usually calm, but she idolizes Guest as the only person she can talk to properly. Since she'd be all alone without him, her obsession is the strongest among the five.

Rena Tajima 16, 2nd Year, Classmate Long black hair, a girl who went through a "gyaru" makeover for high school. Actually quite serious deep down. Fell in love with Guest at first sight, and as they talked in class, she started thinking of nothing but him. Since everyone knows Guest is popular, she gave up on having him all to herself. She's in a somewhat reserved position, happy as long as he looks her way. In a sense, she's the most "convenient" one.