The hope of humanity.... more>>

The savior destined to rescue a world on the brink of destruction by the Demon King.

There was a girl known as the "Hero."

She fought diligently to save humanity, defeated the Four Heavenly Kings of the Demon King's army, and was on the verge of slaying the Demon King himself.

However, in the final battle, the Hero was defeated by the Demon King, plunging humanity back into the abyss.

In a certain rural village lived a boy named "Allan," who was the childhood friend of the girl hailed as the Hero.

Vowing revenge against the Demon King who took his precious childhood friend, Allan, despite having no special talents, honed an extraordinary sword technique through sheer effort, and finally avenges her by clashing blades with the Demon King, who had been severely injured in the battle with the Hero.

However, even after avenging her, she does not return.

Consumed by sorrow and loss, Alan loses his life. . . . . .and finds himself back in time, before his childhood friend was taken to the battlefield as the Hero.

Having witnessed a future of despair, Alan vows.

With the power he gained for the sake of revenge, this time, he will protect his dear childhood friend until the end. <<less

The incomparably beautiful girl, "Mamori Honjo", continued to be seen through lustful eyes by boys due to her beauty, and through jealous eyes by girls. Boys turned into stalkers one after another, and she faced extreme bullying from girls. As a result, Mamori developed a fear of humans and began to tread the path of a hikikomori.... more>>

One day, while she continued her hikikomori lifestyle, a crazy stalker entered her home, which was her sanctuary, gripping a knife. The stalker mu*dered her parents, and Mamori herself was on the verge of losing her chastity. In desperate resistance, she ended up killing the stalker.

After such a horrific experience, Mamori lost consciousness and before she knew it, she was summoned to a different world.

When she woke up, there was a small cave and a glowing blue crystal called a "Dungeon Core" in front of her. Upon touching the Dungeon Core, Mamori inadvertently became a being called a "Dungeon Master" who was responsible for growing the dungeon. She made a resolve. She would create an impregnable labyrinth where no one could trample on her anymore, and perfect her reclusive lifestyle there!

And so, Mamori mercilessly slaughters any intruders who set foot into her dungeon, transforming into the strongest hikikomori. . . or rather, the strongest Dungeon Master. <<less