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In an unexpected turn of fate, Rimuru Tempest, the mighty Demon Lord of the That Time I Got Reincarnated as a Slime world, is transported to the dangerous and unpredictable One Piece world-before the events of Punk Hazard. 

But when he arrives, everything he once was has been stripped away. His vast powers are reduced to a mere shadow of their former self, with only one lingering ability: 

___the power to copy Devil Fruits-but only at 20% of its true potential.___

Now, Rimuru must navigate this new world, filled with pirates, Marines, and powerful enemies, while struggling to find a way to regain his lost power. 

His knowledge and skills are still blurr , but can they truly carry him through this chaotic era?

 The world before Punk Hazard is one teeming with challenges, and every step forward only reveals more dangers lurking in the shadows.

Meanwhile, Ciel, his trusted companion, sacrifices all of her immense powers to follow him, crossing into the One Piece world with a desperate hope of being by his side.

 However, her fate takes a dark turn when she is captured by the corrupt Celestial Dragons and forced into slavery, trapped by their insidious control.


Who will rise to save Ciel from the hands of these tyrants? Will Rimuru, now so much weaker than before, be able to rescue her and confront the Celestial Dragons' terrifying power?

 Or will the One Piece world itself be plunged into a war like no other? Revolutionary Army! 

As the war for freedom, revenge, and survival begins, Rimuru's journey will reveal new alliances, fierce enemies, and unforeseen challenges.

 Will the once-unstoppable now being weak Rimuru find his footing once again? And will Ciel ever find the freedom she seeks?

The clock is ticking, and the fate of both worlds lies in their hands.

Table of Rimuru : Journey with Straw Hat

Table of contents

Volume 1 :DressRosa & Punk Hazard