Yamada Kenichi finds himself lost when his favorite online game shuts down, leaving him seeking a new challenge. Discovering an invitation to a never-ending game promising unparalleled difficulty, he dives in without hesitation. Reborn in a fantasy realm as Allen, he embraces the daunting 'Hell Mode' setting, unraveling the enigmatic Summoner class without the aid of guides or fellow players. Navigating this mysterious world, Allen faces the ultimate test of skill and strategy as he strives to conquer the game's limitless potential.