Onigawara Yuutarou is your average high-school kid, a bit on the quiet, kind-hearted side. One day, he walks through an arcane ritual and ends up... more>> summoning a demon, Slayer, who will grant him tree wishes. Horrified by Slayer's violence, Yuutarou wishes for Slayer to stop using his demon powers, turning him into a human. Now Slayer's stuck with Yuutarou in a perfect personality mismatch, and to top things off, if one of them gets hurt, so does the other. <<less

A long time ago, in a certain world, the evil magician Aval was thoroughly defeated by a brave man Ruldo, who carried "Sword Breaker". Unfortunately,... more>> Ruldo was banished by Aval's curse into a different world. Now, will the call for a hero bring Ruldo back into his original world once more? <<less