A 34-year-old virgin, unemployed hikikomori who is still living with his parents is kicked out of his house one day after his parents die. While feeling that his life is complete garbage, he sees a truck speeding towards a group of high school students and saves them, but gets hit and dies. When he wakes up, he finds himself reincarnated as a baby in a world of sword and magic. He keeps his memories from his previous life and decides to restart his life and do things right this time. He is given the name Rudeus Greyrat and begins his new life in a new world.