Assassination Academy, a place where killing is the only way out. It's either you live or die. Axe was given a mission and to fulfill it, he needed to get into the academy. Upon entering, he met a girl named Athena. She was an assassin like him. He tried befriending her and noticed that there was something off about her... They became friends and partners in crime. But will their relationship last when they learn each other's secret?