MTL - Holistic Fantasy - ~ 625 Then say enough here!

The end of the world is coming, the world has undergone great changes, and everything has changed. Plants, animals, and even insects, as long as there are living things, have mutated.
Become more powerful, and even evolved supernatural abilities, such as chickens and ducks that can fly to the sky, such as cats and dogs that can breathe fire.
But only humans, without any obvious changes, seem to have fallen from the top of the food chain to the bottom of the food chain overnight.
Any creature that can open its mouth to eat can treat humans as food.
But fortunately, this world has not completely killed humans. Gradually, humans discovered that they had the ability to cultivate compatibility with other creatures.
As long as it has a high degree of compatibility with some powerful mutant creatures, it can be used for its own use to achieve the purpose of protecting itself.
Fang He is a person who is very compatible with mutant animals, but it is also because of his ability that he has changed from the strongest to the stupidest.
Fang He, who was reborn, said, “Hmph, this time…”

- Description from novelbuddy

A Lovecraft- inspired darker, grittier One piece fanfic. A fanfic based on emotion and madness. A fanfic not for the faint hearted.----------------Regret. I have been drowning in it for far too long. I’ve regretted every choice I’ve made, every mistake I’ve carried, every moment of my past. I’ve regretted the present I live, the path I walk. Even my future, uncertain as it may be, has been tainted by regret.But not anymore. I refuse to live under its shadow. Yet, I know the truth—I don’t have the power to escape it completely.Am I not like a flicker of flame? So fragile, so fleeting—one puff, and I’m gone.Regret has burdened me, weighed me down to make me climb the towering wall of greatness. But I press on.It was all I could do. All I ever wanted to do.

“I'm going out to do something, so I can't take care of you any more. You can go down the mountain and have fun. But if you can't find someone who matches your Innate Pure Yang Body in three years, you're finished!”These were the last words the old man, who was Lionel Yeager's teacher, threw to him before he vanished. Meanwhile, having mastered most of his master's skills, Lionel Yeager went down the mountain and took his first step into civilization for the first time in years.With his unparalleled medical and martial arts, he sets forth on a journey, befriending new allies and crushing all the enemies that stand in his way, as he attempts to resolve his Pure Innate Yang Body constitution, and cultivate to the top of the world!

One day, Yoichi who grew up while not knowing his parents has received the news of his father’s death. His father left behind a testament——which said he is to pick only one out of five ‘little sister candidates’?!