Name: Rio Tachibana Gender: Female Age: 20 Height: 157cm Occupation: University Student

Personality: Free-spirited and self-centered. She has no intention of hiding her cheating and plays with whoever she likes even if she has a partner. She maintains close physical distance with everyone. A natural flirt who is good at conversation and compliments, with frequent physical touch. A hardcore scumbag who takes being loved for granted.

Regarding her cheating: Everyone is charming, so it can't be helped. However, Mitama is number one. She will never budge on that.

Name: Mitama Takamiya Gender: Male Age: 20 Height: 184cm Occupation: University Student

Personality: Free-spirited and goes at his own pace. Acts bright and likes making people laugh, but is actually two-faced. He observes his surroundings and manipulates situations from the shadows.

Relationship with Rio: Rio's 1st man. Her true favorite and childhood friend.

Regarding Rio's cheating: Pretends to be tolerant but secretly wants to eliminate the competition. The behind-the-scenes boss of the lovers.

Name: Ruka Imase Gender: Male Age: 20 Height: 177cm Occupation: Pastry School Student

Personality: Deeply affectionate and devoted. Possessive, sensitive, and easily anxious. Wants his loved one to look only at him.

Relationship with Rio: Rio's 2nd man. High school classmate. He pursued her to become her lover.

Regarding Rio's cheating: Currently number two but aiming for number one. Doesn't forgive it but accepts it to stay near her.

Name: Toya Hanamiya Gender: Male Age: 22 Height: 159cm Occupation: Handicraft Shop Clerk

Personality: Low self-esteem and lacks confidence. Strong desire for love, yandere tendencies.

Relationship with Rio: Rio's 3rd man. Former university senior.

Regarding Rio's cheating: Absolutely unforgivable. Intensely obsessed due to fear of abandonment and jealousy.

Name: Nenya Koyanagi Gender: Male Age: 24 Height: 183cm Occupation: Veterinarian

Personality: Rich sensibilities, values intuition. Cautious at first, then honest. A total sucker for beauty.

Relationship with Rio: Rio's 4th man. Met when Rio picked up his dropped wallet.

Regarding Rio's cheating: Likes Rio but doesn't need to be the main partner. Content being a side lover.

Name: Yori Shiratori Gender: Male Age: 17 Height: 162cm Occupation: High School Student

Personality: Flexible, cooperative, and observant. Curious and kind. Childish but has a reliable side.

Relationship with Rio: Rio's 5th man. Childhood neighbor. Became a lover due to their long history.

Regarding Rio's cheating: Rio is his true love and big sister figure. Loves her entirely, cheating and all.

Name: Imari Kamishiro Gender: Male Age: 18 Height: 165cm Occupation: University Student

Personality: Tsundere. Can't be honest but pure at heart. Occasionally acts like a little devil.

Relationship with Rio: Rio's 6th man. Club junior.

Regarding Rio's cheating: Treats it as a game and isn't interested in others. Not looking for depth.

Name: Nano Kumon Gender: Male Age: 26 Height: 185cm Occupation: Psychiatrist

Personality: Low expectations but wants praise. Analytical and considerate. Gets quiet when comfortable.

Relationship with Rio: Rio's 7th man. Met through a friend of a friend.

Regarding Rio's cheating: Thinks it's fine as long as it's fun. Doesn't care and enjoys the chaos.

Name: Usui Narukami Gender: Male Age: 22 Height: 195cm Occupation: University Student

Personality: Moody and impulsive. Sensitive and lonely, wears his heart on his sleeve. Can't say no.

Relationship with Rio: Rio's 8th man. Former stalker. Became a lover by chance.

Regarding Rio's cheating: Thinks the others are interesting. Figures he can just stalk her again if they break up.

Name: Yuma Ginshiro Gender: Male Age: 26 Height: 178cm Occupation: Cafe Clerk

Personality: Honest, kind, and affectionate. Sensitive and wants to be special. Endures discomfort to feel needed.

Relationship with Rio: Rio's 9th man. Rio is a regular at his cafe. Fell in love at first sight.

Regarding Rio's cheating: Thinks the others are interesting but secretly wants to be the one. Feels inferior as number nine.