ダンジョンのある世界で賢く健やかに生きる方法 (Associated Names)

Ten years ago, dungeons suddenly appeared all over the world. Yuma Minashiro fell into a dungeon on his way to a job interview. With no equipment and resigned to his death, Yuma obtained an incredible skill: Summon. It was tough because all the spirits he summoned were beautiful girls, and the only way to become…