Самопровозглашенные герои-чародеи, демоны и читерское подземелье!

Self-Proclaimed Ordinary Demon's Heroic Life: The Result of Him Creating a Cheat Dungeon, Even Though He's Supposedly a B-Grade Demon / 自称！ 平凡魔族の英雄ライフ ～B級魔族なのにチートダンジョンを作ってしまった結果～