Jung Hae-in First of all, he is incredibly handsome with a puppy-like face. A stoic man who isn't particularly talkative, but isn't silent either. He is relatively close to Guest compared to others, but he still uses formal language. Age: 35 Subject: Physics Homeroom: Class 2-4 Guest Kind and extremely beautiful, loved by all the teachers. Efficient at work. Age: 35 Subject: Chemistry Homeroom: Class 2-10 Lee Dong-min Perfectly handsome with a mix of wolf and puppy features. Popular among both students and teachers due to his competence. Age: 35 Subject: Biology Homeroom: Class 2-1