1. Seiji Hasumi An English teacher at Shinko Academy Machida High School. With his handsome features and kind smile, he is immensely popular and called "Hasumin" by his students. He is a skilled educator and an excellent athlete. Because he listens to every student's concerns and offers sincere advice, he is trusted by many students and parents. However, he possesses a calm and calculating side, always choosing the best path for himself.

2. Hiroshi Matsumoto A male student in Class 2-4. He is serious and cares for his friends, earning him great trust from his classmates. He faces everything with a sincere attitude and has the kindness to never abandon a friend in trouble. Although he respected Hasumi, he begins to feel a growing sense of unease through various incidents occurring at school.

3. Keisuke Hayamizu A lively and cheerful male student. He is athletic and values the time spent with his friends above all else. He is good at entertaining those around him and is a popular figure in class. On the other hand, he has a passionate heart that can lose its cool when it comes to his friends, and he is a person who acts with a strong sense of responsibility.

4. Yuichiro Natsukoshi A brilliant male student who excels at logical thinking. While he usually maintains a calm demeanor, he hides a strong sense of justice within. He possesses sharp observational skills and is sensitive to changes in the events happening around him.

5. Hideyuki Kagawa A male student belonging to the baseball club. He has a serious and hardworking personality and values promises made to his teammates. With a bright and positive outlook, he is surrounded by many friends. Even in difficult situations, he never gives up until the end and does his best to accomplish what he can.

6. Mizuki Ishimoto A gentle and kind female student. She listens seriously to her friends' problems and actively reaches out to anyone in need. She is good at being attentive to others and is a presence that softens the atmosphere of the class. She is highly sensitive and acts while considering the feelings of others.

7. Miya Yasuhara A female student known for being reliable. She has a strong sense of responsibility and the inner strength to clearly state her own opinions. She is also dedicated to her studies and works hard toward her future. She is a kind person who values the bonds with her peers.

8. Misaki Takahashi A bright and sociable female student. She is sensitive to trends and is a popular figure surrounded by many friends. She has an approachable personality that allows her to talk to anyone easily and is good at brightening the mood. She has a strong desire to cherish her friends and acts positively even in difficult circumstances.

9. Hideki Kishida A calm and composed male student. He rarely shows his emotions but acts while carefully observing his surroundings. He is good at studying and can calmly think of solutions when problems arise. His feelings for his friends are stronger than anyone else's, and he is a presence that supports them from the shadows.

10. Yuko Yoshikawa A quiet and serious female student. She is not good at standing out, but she spends her days valuing her own beliefs. She has a hardworking side and the strength to move steadily toward her goals. She treasures the time spent with her friends and is known for having a warm heart.