Taiki Wakanbe suddenly woke up under a tree. He neither knows how he ended up there, nor what he has done in his life until now. He only remember his own name. After he was attacked by a group of bandits,he was rescued by a halfdemon called Chizu Fujimoto. Shortly after his meeting with Chizu, Taiki decided to become an adventurer to make ends meet. He was also able to join a chaotic group of adventures that he can call friends. Everything was fine but Taiki will find the terrible truth about his memory loss and his summoning to this world. Is he able to ressist the evil forces that are trying to destroy him?