Naruto System in One Piece - Chapter 4

Yu Yuehan is the usual rich, perfect, aloof president—the richest man in City H; but one day, a female toddler suddenly appears in his life as his daughter! Despite being certain that he has never touched a woman before, DNA tests certify that the toddler is his! He soon becomes a good ‘daddi’ for the little toddler, Xiao Liuliu.

Two years later, for some inexplicable reason, Xiao Liuliu becomes very fond of a trial nurse, Nian Xiaomu, hired to take care of her. Nian Xiaomu has a strong personality and refuses to let anyone bully her. Constantly wary that anyone might cause harm to his daughter, Yu Yuehan keeps a constant watch over Nian Xiaomu. However, his black-bellied daughter has plans for her father up her sleeves… Over time, Nian Xiaomu reveals her charming side bit by bit; and for the first time in his life, Yu Yuehan is drawn in by this mysterious woman…

“Daddi, you are so handsome!” Xiao Liuliu blushes.

“Daddi, I want hugs!” Xiao Liuliu coos.

“Daddi, I want a younger sister! Quick make one with Mommi.”

“Daddi…”

Yu Yuehan says in a deadpan fashion, “I have never slept with any woman! How can I have a daughter!?”

“Did Mommi sleep with you without you realizing it?”

Yu Yuehan: “…”

- Description from Novelupdates

Jin Lin was not an object within the pond; he would transform into a dragon upon meeting the wind and clouds!

Yu Haoran returned to his youth. Not only did he retain all the memories of his past life, but he also obtained omniscient and omniscient domain towers that could accelerate time.

Look at him: Seize opportunities, seize good fortune, destroy enemies, stir up trouble!

This was a story of leveling up and killing monsters.

- Description from Novelupdates

A youth crept on the ground in a snowy night. Hours ago, his tendons were cut because the girl he liked plotted against him. A mysterious middle-aged man saved him, and a pair of gigantic purple pupils appeared in the sky. Under the thunders and lights, the rare Demon Pupils and Sacred Body were awakened. That was what he should have been.

However, in this world, strength was the only way to support a man to live. His adoptive father died for covering him. His true love fell into the abyss for saving him. He wanted to rise up, to take revenge, and to protect the ones he cared about.

Occasionally did a strange figure confuse him. Behind the huge demon pupils, he often saw a thirty thousand feet tall black figure. What was it? Who was that?

It was said that the ultimate bloodline of the universe was the Primal Chaos Divine Body. It was a divine existence which could break the heavens and annihilate the world in a second. However, this sort of divine body had been extinct ten thousand years ago.

Could it be that apart from the Sacred Body, there was another body in him?

- Description from Novelupdates

I had finally done it—achieved the ultimate Paladin build. Maxed stats, impenetrable armor, and so many resistances that death itself had given up on me. I was an unkillable tank, an indomitable force. Nothing could stop me.And then my PC exploded.I died.Irony, thou art a cruel mistress.But instead of the afterlife, I woke up as my Paladin character… in the wrong freaking genre. Instead of castles and dungeons, there were people flying around on swords, shooting qi beams like fantasy laser guns.“This is definitely the wrong genre,” I muttered, watching a pompous young master sneer at me.“Kowtow, kiss my foot, and beg for forgiveness!” he declared.I looked at my imaginary maxed-out health bar, then at his flimsy silk robes.Oh, this was going to be fun.