After Ten Million Years in Seclusion, I Emerge Completely Insane!

An invincible, absurdly funny story.

From the start, he awakens the Great Swordsman System from One Piece and gains top-tier Haki in all three forms.

But when Zhang Chunliang looks up, he sees someone flying through the sky on a sword?

A Sword Immortal?

To keep Zhang Chunliang from getting killed by an immortal, the System locks him away in a dark room.

After the first ten million years, Zhang Chunliang has trained himself into the strongest swordsman in history!

After the second ten million years, Zhang Chunliang has cultivated his three forms of Haki to an unmatched level!

After the third ten million years, Zhang Chunliang has nothing to do and is going stir-crazy...

The Hell Fruit given to him by the System grants Zhang Chunliang eternal life.

But he cannot resist the ravages of time.

He has grown old, become invincible, and gone mad.

This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.