A True Assassin Among a Classroom Of Assassins

There is a school that seems normal on the outside however, on the inside there was a specific class that was different from the rest with them being from normal students into having to be teenage assassins, their target their teacher, who is seemingly invincible with being able to go mock speed, be able to survive anything except anti-him weapons in this time, they decided that maybe a pair of eyes who have actually been a experience. Assassin could be what they needed their tale now