Invincible: Mark's Journey

After transmigrating as Mark Grayson, the Invincible,

he unexpectedly ends up in the One Piece world from the start.

He trains in Haki from scratch and gradually awakens his power.

Once he’s strong enough, he returns to a parallel universe of his own world.

But the journey isn’t over.

He goes back to the world of One Piece once more to face Imu, the one at the top of the world.

With invincible might, he shatters the darkness that has endured for eight hundred years and liberates the entire world!

After freeing the One Piece world, Mark will eventually return to his original universe.

But his legend is only just beginning...