A middle aged NEET otaku is forced to leave his family home. Unattractive and penniless, he finds that he has reached a dead in life. He realises that his life could have been much different if he had made better choices in the past. When he sees a fast moving headed towards a group of teenagers, he tries to save them and ends up getting run over instead. When he opens his eyes, he finds himself reincarnated into a fantasy world as Rudeus Greyrat. Given a new life in a new world, he decides to live his next life to the fullest without regret. Thus starts the journey of a man restarting his life.