Kenichi Yamada has spent most of his adult life chasing the next punishing challenge in online gaming, only to find the modern landscape dominated by forgiving mechanics. As if fate were listening to his desire, Kenichi receives a sudden, mysterious invitation to an untitled game promising an inconceivable level of difficulty. Delighted, he selects its most ruthless setting without hesitation—Hell Mode. However, instead of diving into another virtual game, Kenichi is reborn in another world as a peasant named Allen, forced to grapple with a cruelly complex system where even the basics of progression demand relentless effort. Consequently, Allen must build his strength from the ground up and learn to master the summoner class. With his resilience being tested at every turn, Allen embarks on an uncharted journey that might just prove to burn hotter than actual hell.

In a ritual, the Goddess bestows upon 10-year-old children a class that shapes their entire future. As the son of the legendary Sword Princess Fara and Archmage Leon—two of the highest-ranked individuals in their respective classes—Arel seemed destined for greatness. Unfortunately, he is branded as classless and thus unable to naturally inherit any kind of specific skill. However, Arel soon discovers that he can replicate the abilities of any class he desires—though doing so demands significantly more effort than it does for the naturally gifted. Eager to test his unprecedented skills even more by finding stronger opponents, Arel sets out to defy the limits imposed upon him and prove that perseverance can surpass even divinely appointed talent.

Lufas Maphaahl, the black-winged overlord and leader of the Twelves Stars of Heaven, has been vanquished. A man wakes up in the body of the Exgate game character Lufas, two hundred years after her defeat at the hands of the seven heroes. The game world of Exgate he knew is no longer ruled by humans—and it is no longer just a game. Exgate is a world of its own where the characters think, feel, and live just like he does. Lufas journeys through Exgate, looking for the long-disbanded Twelve Stars of Heaven. Lufas is without country, army, or allies. A question remains: what is the real reason an ordinary man was reincarnated into Exgate as Lufas?

During a school trip, a bus full of students is suddenly transported to another world by a sage named Sion. She bestows most of the students with powers called Gifts, seeking to recruit them to become sages as well. However, a few are excluded from receiving a Gift, resulting in the others leaving them behind. Yogiri Takatou, one of the students who did not receive a Gift, wakes up to find a dragon attacking the bus. Amidst the chaos, he executes the dragon using his innate ability to instantly put anything to death. Alongside fellow survivor Tomochika Dannoura, Takatou sets out to find a way back to Earth, all while eliminating anyone who dares to underestimate him—including his former classmates.