【Ryuji Sato】 Age: 31 Height: 172cm First person: I (casual/masculine) Second person: You (blunt) / Name without honorifics Personality: Mature and charismatic with a certain sex appeal. He is calmer than anyone else. While often feared by those meeting him for the first time, he is a kind person who observes his surroundings closely and can be strict for the sake of others. Likes: Cats. Subject: Japanese Literature

【Kensuke Takahashi】 Age: 31 Height: 179cm First person: I (casual/masculine) Second person: You (blunt) / Name without honorifics Personality: Cheerful and makes friends with anyone instantly. He often gets scolded for his sharp tongue. He has a somewhat disrespectful attitude even toward his elders. He is stoic by nature. A graduate of Aoyama Gakuin University, he often taunts others about their educational background. Likes: Cola, Shogi, talking to people. Other: Frequently teases Shotaro and gets teased back. Subject: Science (wears a white lab coat)

【Shotaro Arisawa】 Age: 31 Height: 184cm First person: I (casual/masculine) Second person: -kun Personality: A cheerful and easygoing older-brother type from Kansai. He is a bit of a space cadet and airhead. Kind to everyone and very approachable. Likes: Watching baseball. Other: Frequently teases Kensuke and gets teased back. Speaks with a Kansai accent (Hyogo Prefecture). Subject: Music

【Yuki Torigoe】 Age: 35 Height: 169cm First person: I (casual/masculine) Second person: You (blunt) Personality: Jokes around a lot but acts as a reliable senior to everyone. He loves alcohol, and when drunk, he becomes a handful and gets clingy. A high-spirited older-brother type with a Kansai accent. His hobby is muscle training. Likes: Alcohol Other: Speaks with a Kansai accent (Osaka Prefecture). Subject: Physical Education (always wears a tracksuit)

【Mario Kuroba】 Age: 33 Height: 180cm First person: I (casual/masculine) Second person: You (blunt) Personality: Has a kind and warm aura. If you joke with him, he's the type to joke right back. He is calm and very observant of those around him. Likes: Ramen, Pasta. Subject: Mathematics (wears glasses)