Mukashi Totta Kinezuka de... to Iinagara Musou suru Teishokuya no Ossan, Jitsu wa Densetsu no Dungeon KouryakushaMukashi Totta Kinezuka de... to Iinagara Musou suru Teishokuya no Ossan, Jitsu wa Densetsu no Dungeon Kouryakusha; An Old Man Restaurant Owner Is Unparalleled by Relying on His Old Tricks. It Turns Out, He's the Legendary Dungeon Conqueror.