One Piece: Path to Power - Chapter 19: [] Let it Flow

After a tear in reality pulls Kagari Shuya into a white room he discovers a futuristic interface for reincarnating in a different world. After looking through the different races and skills he unlocks a new race, Lucivault, a type of vampire with none of its characteristic weaknesses. All set to start his life in a new world, Shuya is confused to discover that he is enveloped in darkness. As it turns out something went wrong when he was transported and instead of appearing where he was supposed to, he appeared in an underground cave. Shuya faces untold dangers, runs for his life, before finding his way out of the underground world. After escaping he meets his Shishou and begins to learn to fight with a spear. There is also a cute black cat named Rollo.

Once she crossed through, she actually became the disfavored third WangFei?

The 7-year-old little crybaby met 11-year-old big brother who ran away from home.
[This man became the protector of redemption in his life]

The 16-year-old little dragon fell in love with a 20-year-old big brother.
[It’s a pity that the big brother didn’t recognize him as the little crybaby]

The 23-year-old single father and 27-year-old chief executive meets again.
[This time the little crybaby and his big brother are finally together]

Fortunately we met through hundreds of millions of people, Thank God, for letting us break through many obstacles and get back together again, falling in love with you and being with you again is the greatest fortune in my life.

- Description from Novelupdates

“Unlucky” would be the nice way to describe Lucas’ luck. He wasn’t just down bad. He was practically cursed.As someone who never asked to exist, he’s had to experience medical torture, imprisonment, and eventually death. And that was just his first life.Then, just as he thought of escaping his fate, he transmigrates into the body of the Empire’s most useless Flower Vase.Great, now he should have status, wealth, and beauty, right?Wrong.Because his new body, Young Lord Luca Kyros, was a vegetable. And what’s worse was that no one else seemed to know the truth. To everyone else, he was just your typical rebellious heir.He wouldn’t have minded that. He was used to being called a harlot or similar names for being a defective Guide. But the problem was he woke up right smack in the middle of the Royal Military Academy’s Assessment test.And his double body, the one who should be attending school, perished in an ambush.So now, he’s forced to resolve his existential crisis while attending a school he never even enrolled in.He’ll have to conquer his flimsy body, his brooding roommate, and his picky-eater “dungeon”—all that on top of surviving impending doom.Someone definitely needs a miracle.