D Genesis Dungeon ga Dekite 3 Nen (Associated Names)

Three years after the appearance of dungeons in the modern era, the world has adopted and started to research as well as farm the dungeons. One day the ordinary, 28-years-old researcher, Yoshimura Keigo, comes in contact with dungeons for the first time. This encounter changes his life dramatically. Curious about his newfound skill, he decides…