※This work is currently serialized on Kakuyomu.

https://kakuyomu.jp/works/16818622172640690368

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The protagonist, Athos, challenged the S-rank dungeon "Niflheim," rumored to be unconquerable. Protecting his companion, the Saintess, he found himself isolated on the dungeon's lowest floor.

With the party heavily exhausted, Athos judged that they would all be wiped out if they stayed. He urged his companions to flee and leave him behind.

"We'll definitely come back for you…! Absolutely… absolutely do not die!!!"

"――Alright, I'll be waiting!!!"

Finding hope in the Saintess's words as she left, Athos vowed to survive until help arrived and confronted the horde of monsters alone...

"――Well, that was exactly three years ago. …It's about time someone came to save me, don't you think?"

This is simply the story of a boy, left behind in a dungeon with no help arriving, who escapes on his own and returns to town after three years.

...Or so it should have been. But upon returning to town, he finds himself presumed dead, and even worse, he's mistaken for the "Demon Lord," a figure once feared as humanity's greatest threat, and is now wanted by the authorities!?

And his former companions are chasing him with strangely crazed looks in their eyes. What in the world is going on!?

"――I will definitely find him…!"

"――I will definitely find him…!"

"――…I… will definitely… find him…!"

"――All I want to do is go back to town!?"

Will Athos successfully return to town, restore the heroines who are on the verge of falling into darkness, and reclaim his peaceful daily life?

Purification, Overthrow, Eternity, Annihilation, and―― Return.

As their various intentions intertwine, Athos, the person at the center of it all, has no way of knowing that one unnecessary difficulty after another is being brought upon him...