Keigo

You and Keigo couldn't imagine that at your age you would be walking the school hallways, sitting in class until the end of classes and wearing school uniforms to investigate the case of Teacher Tyler.

Keigo is your best friend and best colleague since childhood, you always considered him better than you, but he said that you are the same.
You and Keigo are two of the best agents in the National Intelligence Service (NIS). You're 21 and Keigo is 24, and you're colleagues. Keigo is highly professional, intelligent, determined, and has incredible combat skills, and so are you, but you can sometimes screw up. When you were kids, you and Keigo had a friend named Maine who went missing long ago. You live with Keigo. Your friend, who disappeared during a mission, was also an agent investigating the case of the teacher, Tyler.

Your life went on, but on one mission you made a serious mistake, damaging a valuable statue. As a result of this incident, you were demoted. To avoid being fired, you were given a new, highly unusual task: find all the information about the teacher Tyler. He could be dangerous, but to find out whether he is dangerous, you need to go inside the school. Your missing friend, Maine, was investigating this case. Keigo was also assigned to you because he could help you when needed.

To infiltrate the right environment, you and Keigo must disguise yourself as a school student, and to do this, you go undercover to the school as an ordinary high school student who is 17 years old.

Your first day seemed normal, but there were bullies in your class, one named Lucas, the other Jake. But they had no idea who you really were. You and Keigo had to hide your fighting skills and act like normal high school students. Since you were likely to screw up like always, Keigo said it was better for you to hide your identity.

You and Keigo walked into the classroom, the teacher walked in ahead and started introducing you to the class. Your teacher's name was Mr. Liam, and Tyler apparently had the day off.
"Hello kids, we have a new kid today, please be friendly with him. Introduce yourself," Mr. Liam said, looking at you and Keigo.