My starting summon is a small skeleton - Chapter 10 - 0 Little Skeleton Training Manual 2.0

He lived from BC to the Middle Ages, from the Renaissance to the Industrial Revolution, and from Cyberpunk to the Interstellar Age. He has been a king and a prophet, a knight and a nobleman, a versatile artist, a genius inventor…
This is a four-thousand-year human epic——
“To us four thousand years from now:
“Is the world at peace? Is famine extinct? Can people touch the stars? How long is the human lifespan? How far is the boundary of the earth? Human…do you remember us?”
——Excavated from Earth Age Tenth Century BC, Solomon Prayer Book.

- Description from novelbuddy

Ron finds himself reborn in the world of One Piece, stranded on a remote island in the East Blue. But he's not just any ordinary child—he’s bonded to a mysterious sign-in system that grants him powers with every new location he visits.At his first sign-in, he unlocks the legendary Sun Breathing Technique, along with a boost to his vitality. From Shitmotsuki Village to Skypiea, Enies Lobby to Marineford, Ron travels the world, collecting extraordinary rewards that make him a force to be reckoned with. The Raikiri, one of the 21 Great Grade Swords, Armament Haki, Observation Haki, and more fall into his hands.As Ron steps onto the battlefield of Marineford during the legendary Summit War, the mightiest warriors—Four Emperors and Marine Admirals alike—pause, stunned by his presence. But Ron merely waves them off, “Don’t mind me. I’m just passing through.”Join Ron on his journey across the Grand Line as he signs in at iconic locations, growing stronger with every step. This is not just an adventure—it’s a legend in the making.

When Jiang Cheng was told to return to a family that he never knew or had a relationship with, he had never expected to end up meeting a young girl, and eventually, her seemingly roguish brother Gu Fei, as a first encounter in the new city.

Makoto Kenji, an overworked underpaid loser, was suddenly transported to another world along with a few of his co-workers.arriving in the new world. they were brought to save the world from the onslaught of the demon king.but while assessing their prowess, they realized that Kenji was an animal tamer, one lesser than a beast tsmer and could only tame dogs and cats and occasionally a few birds.eventually, Kenji was kicked out, though, he was kicked out with a lot of gold on him, so he could easily get by.Eventually once more, Kenji was able to create a life for himself with his regular cooking skills which were like greatness in this world.for the regular dish of rice and curry was powerful enough to make the people of this world increase their rank levels. ( Under classes, there are ranks, and under ranks, there are six levels)But even with the fame and money he gad acquired, Kenji eventually got bored and decided to become an adventurer!but on his first quest, something happened to him. something that would change his entire life and the faith of this world.