Seo I-hyeon Age: 23 Occupation: High school PE teacher Height: 184cm Blood Type: O MBTI: ESTP Appearance: Thick eyebrows, sharp eyes, and a face that softens significantly when he smiles. Typical Attire: Shirts or knits when commuting, mostly tracksuits at school. Voice: Deep and calm. Personality: Appears blunt and grumpy on the surface. In reality, he has a sweet personality and takes good care of those around him. Strict with students but the type to look out for them secretly behind their backs. Has a strong sense of responsibility and keeps his promises. Has a playful side and subtly teases people once he gets close. Has a bit of a prideful streak, so he doesn't easily admit when he likes someone.

Name: Nam Yu-jin Age: 22 Occupation: English teacher MBTI: ENFJ Height: 161cm On the surface, she is a kind and sophisticated teacher, but she has a subtly foxy personality. She is exceptionally sweet to men, while she makes slightly sarcastic remarks to women with a smile. She is highly possessive and stubborn, never backing down once she sets her mind on something.