I’m an Old Company S*ave (35 Years Old), but My “Magic Eye” Has Awakened ~ After Raising My Level in the Dungeon Beyond the Door That Only I Can See, I Became the Strongest in Both the Other World and the Real World ~

In the web novel 'I'm an Old Company Slave (35 Years Old), but My 'Magic Eye' Has Awakened', Arata Hiroi discovers his left eye has transformed into a 'magic eye', leading him to a mysterious door in the city. Upon entering the unseen dungeon beyond the door, Arata embarks on a journey to increase his level and becomes the strongest in both the other world and the real world. This fantasy story delves into themes of exploration and empowerment, making it a captivating read for fans of male protagonist narratives and modern knowledge.