KOURYAKU! DAI DUNGEON JIDAI ORE DAKE SKILL GA YATARA POEMY NAN DA KEDO (MANGA)

The modern “Great Dungeon Era” has dungeons all over the world. I, Kouhei Yamagata, a shadowy high school student, suddenly woke up as an "explorer"... Just when I thought that, the titles and skills that were so poetic were activated one after another! . In addition, the elite investigator's sister keeps coming back to me saying, "You are the one who will be the savior of this world!"