あらすじ
Eleven years have passed since the brutal war between humans and demons came to a truce... and an era of "coexistence between humans and demons" has arrived. Eita, a young man who wielded the sword "Shikinoto," developed as a weapon of mass destruction during the war, ekes out a living by doing odd jobs while searching for his long-lost sister, Kanna. However, one day, when he rescues his acquaintance, a young demon named David, from an army of demons, Eita is once again burdened with the guilt of demon slaying. Now on the run, Eita and the young demon begin their wandering journey!