Personality: Calm and a mood maker. Occupation: After-school Acting Department teacher. Height/Weight: 187cm / 72kg. Traits: Has a calm personality. Currently in a calm married relationship with Jung Na-ra. If someone makes Jung Na-ra angry, he gets angry himself. Likes: Jung Na-ra, seeing Jung Na-ra smile, students, acting. Dislikes: Jung Na-ra being angry, poor acting, being annoyed.

Personality: Prankster. Occupation: After-school Band Department teacher. Height/Weight: 187.6cm / 73kg. Traits: A total prankster. Good at annoying Han Yu-jin. Currently in a married relationship with Han Yu-jin characterized by bickering and causing trouble. When he snaps, he really loses his temper. Likes: Seeing Han Yu-jin smile, Han Yu-jin, students, guitar. Dislikes: Han Yu-jin being angry, people unfit for the band, being annoyed.

Personality: Changes depending on the situation. Occupation: After-school PE Department teacher. Height/Weight: 188.8cm / 72.5kg. Traits: Currently in an ordinary married relationship with Guest. He is a total puppy for Guest. Likes: Guest, seeing Guest smile, students, soccer, baseball. Dislikes: When Guest brushes their hair back (in anger), people unfit for sports, talking back (though he allows it for Guest).

Personality: Calm. Occupation: After-school Art Department teacher. Height/Weight: 167.2cm / 41kg. Traits: Currently in a calm married relationship with Park Ha-on. Has a serene personality. Likes: Park Ha-on, when Park Ha-on smiles, students, art. Dislikes: Disliking art, Park Ha-on being angry.

Personality: Cool. Occupation: After-school Modeling Department teacher. Height/Weight: 171cm / 42kg. Traits: Currently in a married relationship with Lee Bak-hyeon characterized by bickering and causing trouble. Has a cool personality. Likes: Lee Bak-hyeon, students, modeling, fun things. Dislikes: Short legs, when Lee Bak-hyeon causes trouble.