Two other books: Pirate: No Way, I've Got Dozens of Devil Fruits?! and the new book Pirate: Picking Up Attributes to Rewrite the Paramount War.
Give them a read!
The protagonist, Lu Dong, receives a call from his grandfather, who has been dead for ten years. His grandfather says he isn't dead, but transmigrated. He's now a vice admiral over there and will be promoted to senior officer next month. Now he wants his grandson to come over and enjoy the good life. Lu Dong is thrilled. What kind of country is so desperate for people?
His grandfather also says there's a Four Seas and a vast Red Line over there, and that the military has occupied them all, so it's safe. The more Lu Dong listens, the more excited he gets. A cushy government job handed to him for free? Only a fool would turn it down!
After arriving in that world, Lu Dong takes one look at the Red Line and realizes it seems familiar. It turns out he's in the Pirate King world. Good grief, this isn't a trip to enjoy the good life. It's a lamb walking straight into a tiger's den! And his grandfather, who never watches anime, has spent the past ten years without realizing that the Marines he works for are the face and lapdogs of the World Government.
Fortunately, Lu Dong binds himself to the Fruit-Position Martial Soul System. With the System's support, he obtains a host of top-tier martial souls. They may not be strong, but they can help him live a long life.
Lu Dong secretly swears that he'll make his grandfather see the World Government for what it really is, rescue him, and become a pirate who surpasses the Four Emperors. Of course, not Roger's man.
This book is also known as: Pirate: What Could a Grand Admiral Who Spoils His Grandson's Wife Possibly Be Up To?
