UNLIMITED SPEED - Chapter 400 400. TYRANNICAL

Yo, Hi! I’m Frank, I made a deal with a demon to pay me some money for receiving a guest for a few days every week.
I had no idea about what I have done.
On May 1st, Conan ‘the God of Death’ came to my house. I was forced to let him in and we get involved in a criminal case.
On May 8th, Bruce Wayne ‘Batman’ came to me. I was forced to follow him to fight crime.
On May 16th, Hannibal Lecter, The Silence of the Lambs, came to my home. I can only say that I really can’t stand my guests.

- Description from Novelupdates

Born with amazing talent and mastery of the sword, at age 13 he awakened his memory about the world thus setting out his own journey and create a world that is for himself and his crew onlyAt the age of seventeen, he went to sea, joined the Rocks Pirates, participated in the Battle of God Valley, plundered the treasures of the Celestial Dragons, formed his own pirate group, competed for the throne of the Four Emperors in the New World, and became the world's number one swordsman.The most powerful attack and the most powerful defense are gathered in one person, and finally became the strongest in the world.Before the war on the top, he helped Whitebeard restore his peak strength. When Whitebeard attracted the attention of the whole world, Li Yuan led his pirate group to attack the Celestial Dragon Holy Land Mary Geoise...

Crossing to One Piece world, he became Roger’s younger brother.

Unexpectedly, Gol-D-Roger who was in his fifties had a teenage brother. But he was so weak.

Fortunately, at the age of sixteen, he actually found himself with a possession soul system.

He had attached to the master IP man, also to the White Phoenix and to Ge Nie with his strong ability of the Hundred Step Flying Sword.

If you think that he can only Purchase these? Then you’re wrong!

Pain, Itachi, Ichigo Kurosaki, as long as there is money, any soul can be Purchased.

- Description from Novelupdates

The heroic person, with the ambition of the jackal, is a heroic person.

Astur Bader: The Brood of Alienation and Flesh, Lord of Death and Slavery.

When the two coexist together and wake up in the world of “ONE PIECE”, these heroes will rise together, and the magnificent sea will bury many bones. It is to become a pirate, to follow the current, to stand on the top of the tide; or to start from A tiny navy, hitting the water in mid-stream, conquering the wind and thunder of the four seas.

The pirate is realistic, the golden finger is the mother’s nest, similar to the nest of the interstellar zerg tyrants, and will gradually establish a base, the BOSS-type protagonist, does not follow the ship, and gradually climbs to the top by means of tricks, not smearing the straw hat group is only this, Enemy or friend only depends on the protagonist’s position at the time. There are right and wrong, but it is more beneficial. Realism is to create and restore the most real and cruel face of the pirate world on the basis of animation.

You can read it even if you haven’t read the original, it doesn’t matter.

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- Description from novelbuddy