Prologue: My Last Breath

Summary: During his last mission with Class 3-E, Nagisa Shiota's life became a living hell as all of his classmates, except him, were killed by their enemy. Unable to live a life without his friends, he decided to commit suicide in order to rest in peace and reunite with his friends. However, when Nagisa woke up, he realized that he was reincarnated in the world of Classroom of the Elite. What will happen to his intervention?