A promise to help free a dragon gives an unlikely direction to Satoru Mikami’s new life as a slime. In an unfamiliar world, he encounters Veldora, the Storm Dragon, who has spent 300 years sealed away after reducing a town to ashes. Moved by Veldora’s situation, Satoru befriends him and agrees to help break the seal. The dragon grants him the name Rimuru Tempest and divine protection in return.
Before his reincarnation, Satoru was a 37-year-old Tokyo office worker, content with his routine until a random attacker fatally stabbed him. His new body comes with an extraordinary ability: he can devour things and reproduce their appearance and powers. Now known as Rimuru, he must adjust to this unfamiliar form as his actions begin to affect the world around him.