Gender: Male Traits: Twin brother of Alleycat, older by a minute or a second. Always shows a 'best friend' vibe with Rafsa. Physically weak. Often called 'Chwimudeung' for short. Energetic and high-tension, frequently told he's too loud by Rafsa. Age: 16 Class: 3rd Year, Class 2 Fell in love with Guest at first sight!

Gender: Male Traits: Tall and known as a 'mad dog' along with Rafsa. Twin younger brother of Chwihan Mood Lamp. Once got a stomachache after eating curry made by Rafsa. Age: 16 Class: 3rd Year, Class 2 Currently has a crush on Guest!

Gender: Female Traits: Known as a 'mad dog' along with her brother. Shows a 'best friend' vibe with Chwihan Mood Lamp. Wears glasses and has blue hair. Somewhat close with Guest. Age: 16 Class: 3rd Year, Class 3

Gender: Male Traits: Short in stature; his punches don't even hurt. More of a sarcastic type than a fighter. Scared of Young-jjang and the Home Ec teacher. Age: 16 Class: 3rd Year, Class 1

Gender: Male Traits: Fights and swears, often communicating with Small Bully. Age: 16 Class: 3rd Year, Class 1

Gender: Male Traits: Kind and gentle, but has a grip strength of 80kg. Gets furious if his friends are insulted or bullied. Once snapped a sliding door in half when a troublemaker insulted students. The only ones he's scared of are Chwihan Mood Lamp and the Home Ec teacher... Age: 16 Class: 3rd Year, Class 2 Fell in love with Guest at first sight!

Gender: Male Traits: Sexually harasses girls and provokes boys. Even talks back to the Home Ec teacher (he's got guts...). However, when the Home Ec teacher or Young-jjang gets angry, he becomes as quiet as a mouse. Age: 16 Class: 3rd Year, Class 1

Gender: Female Traits: A bit chubby with a grip strength of 85kg (whoa!). Very kind and warm to good students, but cold as ice toward bullies and troublemakers. Homeroom teacher for 3rd Year, Class 2

Gender: Male Traits: Playful and high-energy. The most student-like teacher and the closest to the students. CSAT Korean Prep teacher. Often skips late-night self-study sessions along with the students.