Reincarnated as a sentient weapon with memories of his past life, but not his name, a magical sword saves a young beastgirl from a life of slavery. Fran, the cat-eared girl, becomes his wielder, and wants only to grow stronger, while the sword wants to know why he is here. Together, the strange duo's journey has only just begun!
Gods appeared when humanity was on the verge of destruction due to the work of demons. Deities called "Idaten" fought and sealed away the demons 800 years ago. Nowadays, the Idaten have no fighting experience and they live peaceful lives. But now the demons are reviving, and the battle between gods, humans, and demons is about to begin.
Saltorine Aldike, or Sari, is a bright, cheerful princess who wants to go on an adventure because she is bored of her tiny little castle in the countryside. One day, a hoard of vicious demons known as "Oni" come knocking on her doorstep, threatening the lives of everyone in the Kingdom. Thankfully, they are saved by a lone traveler named Kibitsu Mikoto who slays these monsters with a mysterious "Peach Eye." Shocked by the dangers of the outside world, Sari decides to set off on a journey of her own. Little did she know that she would set in motion a chain of events that will come to determine the fate of this magical world.
The story follows a 34-year-old man who is killed after trying to save someone from getting hit by a car. He soon finds himself reincarnated in a magical world as Rudeus Greyrat, except that he gets his whole life reset, starting as a baby.
With all of his knowledge from his previous life, and a new heaping helping of magical ability, Rudeus quickly becomes a formidable warrior ready for adventure. Oh, and he's still a total pervert.