Sora Amamizu was the weakest adventurer, dubbed a "bottom-tier F-ranker."

On the day he was assaulted by an E-rank adventurer and had his own equipment stolen, Sora picked up a black orb in the dungeon.

When the orb's power was unleashed, a status board floated before Sora's eyes.

Breaking through rank limits, he distributes stats upon level-up.

Customizing abilities, he creates builds impossible for other adventurers.

What's more, ultra-rare items are guaranteed to drop.

Refining dungeon armaments one after another, Sora grew stronger.

—This is the story of one who will be called the strongest adventurer, beginning from his weakest self.

*This work is also simultaneously posted on Kakuyomu.