MTL - City: My Apprentice is a Boss - Chapter 255 1 punch

He Lang died by his own hands for the sake of his imperial younger brother’s ambition, whom he loved. He was offered to be reborn in exchange for giving up his past romantic feelings. Reborn without the burden of his romantic feelings, he brings with him a manual to new worlds. He wholeheartedly followed the instructions of the manual to complete the tasks, not knowing that the originally slag gong was blackening…
He pleaded to his affectionate Emperor brother to release him, he pleaded to the paranoid prisoner next door, but until the end he remained baffled.
In the end, he discovered that the full name of the manual was – “Slag Shou Cultivating Manual”
Σ (っ ° ° °;) っ!

- Description from Novelupdates

Duncan Abnomar was transmigrated to a magical world.Most of the lands of the world had sunken, and the surviving humans could only live on islands. Due to an unknown reason, the world was also contaminated and strange phenomena and things would randomly appear.Humans had developed steam gear technology, and the islands were connected through boats. They survived by studying strange phenomena that happened all around the world.However, as the captain of a scary-looking ghost ship, Duncan was facing a huge challenge.“How the heck do I steer this ship?”Highly recommended by experienced editor: MC is transmigrated to a world mostly covered in water and far from civilization. He becomes the captain of the ghost ship, the ‘Homeloss’. He steers through the fog and adventures through the broken world and the unknown deep sea. As he discovers the ruins of abandoned civilization, he would also stumble into the war between the strange phenomena and the devil gods.The story takes place in a combination of ocean and Chutly mythology world, a new and interesting background. It’s an attractive story to read due to the author’s sense of humor and mastery over the ambiance of the story.—————Another-style introduction:“On that day, a thick fog engulfed everything.On that day, he became the captain of a ghost ship.On that day, he crossed the dense fog and faced a completely overturned and shattered world – the former order was completely gone, and peculiar phenomena dominated the endless seas beyond civilized society.The island city-states and the fleets challenging the sea have become the only lights of civilization left, while the shadows of old days still lurk in the deep sea, waiting to devour this dying world again.But for the new captain, there’s only one pressing question – Does anyone know how to sail this damn ship?!”

There was a Senior Brother and a Junior Sister. One of them was transmigrated to this world and had cheats while the other was the reincarnation of a Great Emperor.

I have a childhood friend.