Aochi no Meikyuu Kurui, Labyrinth Junkie of Blue Blood (Associated Names)

Forty years have passed since dungeons from different dimensions appeared on earth. By now, most energy resources are coming from the dungeon, its’ existence had already been integrated to everyday life. Our protagonist, Toudou Tsukihiko was the man who dreamed of becoming one of the seekers who venture into those dungeons. Unfortunately, he lacked the…