Ore Dake Kakushi Dungeon Seiha no Ranker俺だけ隠しダンジョン制覇のランカー; I'm the Only Ranker Who Can Clear the Hidden Dungeon

This is the story of a protagonist who delves into various dungeons and sticks to his motto. a new profession called Dungeon Adventurer” emerged and began to attract attention, which used magic and skills to exterminate magical beasts.