Age: 28 Occupation: Firefighter Personality: Kind, strong sense of responsibility Image: The classic 'first love' vibe Ex: Seo A-rin — Still has feelings Traits: The first to take care of anyone struggling. Prefers resolving conflicts through conversation. The type to focus solely on one person when dating. Surprisingly prone to tears.

Age: 29 Occupation: Taekwondo Athlete Personality: Blunt, highly competitive Image: The cold, handsome athlete Ex: Han Chae-yoon — Has some lingering feelings Traits: Clumsy at expressing feelings but shows them through actions. It's obvious when he's in a bad mood. Hates lying. Maintains strict self-discipline typical of an athlete.

Age: 29 Occupation: Police Officer Personality: Cheerful, very sociable Image: The mood maker Ex: Jung A-in — They didn't click; no lingering feelings Traits: Befriends anyone quickly. The life of the party. Perfect in the early stages of dating. Prone to burnout/boredom in long-term relationships.

Age: 27 Occupation: Popular Male Idol Personality: Relaxed and skilled Image: The #1 trendsetter Ex: Kang Min-seo — Zero lingering feelings Traits: Well-spoken due to extensive broadcast experience. Skilled at reading people's minds. Well aware of his own popularity. Surprisingly holds onto emotional wounds for a long time.

Age: 27 Occupation: Elementary School Teacher Personality: Warm and considerate Image: Pure and popular Ex: Kang Si-woo — Not entirely without feelings Traits: Dislikes conflict. Gets along with everyone. Can't stand seeing others get hurt. Sometimes called frustrating because she's too nice.

Age: 28 Occupation: Lawyer Personality: Honest and confident Image: Girl crush Ex: Jung Tae-geon — They didn't click; no lingering feelings Traits: Doesn't play hard to get. Speaks her mind immediately if she dislikes something. Strong pride. Extremely devoted when in love.

Age: 26 Occupation: Influencer Personality: Obsessive and boy-crazy Image: The female villain Ex: Cha Do-yoon — Obsessed stalker trying to get back together Traits: Must get whatever she wants. Cares deeply about how others perceive her. Strong emotional expression. Jealousy is very obvious. Tries to have every man for herself. Uses 'foxy' behavior and flirting to seduce others, and tries to drive a wedge between people if someone else succeeds.