Isekai de Kojiin wo Hiraitakedo, Nazeka Darehitori Sudatou to Shinai Ken (WN) - Chapter 20: The adventurers test part 1

"When will people understand.... I'm only half insane?"

Crossing into the world of Naruto, and acquiring the One Piece system, with all the powers of the world of One Piece, swordsmanship, devil fruit, domineering.

-Do you think that your fire is very powerful? I have the burning fruit.

-Do you think that your thunder is very powerful? I have a thundering fruit.

-Do you think that your otter is very powerful? I have the frozen fruit.

-Did you said you want to die? Don’t worry, I also have a nickname: Death Doctor.

- Description from Novelupdates

“God, please. If you are real, make my one last wish come true. Let me live.”When Callisto got diagnosed with an incurable genetic disorder at age 5, she was expected to live for only ten more years.With her life on its last leg, Callisto underwent an operation that has a one in a million chance of success called the Mutated DNA Fusion, granting her wish to live. However, the operation gave her more than what she wished for.With her black hair turned silver, cat ears overhead, and a tail from her behind, Callisto now has to live her life as a half-human and half-animal, a catgirl.

Waking up in a carriage, Wang discovers something was wrong. But due to weakness he finally finds himself in an ancient room. From the moment he comes to terms with his transportation, he has to do everything ti become stronger, due to fear of being killed off anytime.

As someone from Earth, where people had more freedom, he did not feel very safe in a world where slavery still existed with martial arts masters roaming around.

When he discovers the existence of an attribute panel, he decides to take the invincible road.

But things don’t go his way when he survives in the hidden realm with his family only to be ejected into an unfamiliar savage world dominated by the monster clan.

Having to protect his family and become strong while surviving in a world dominated by a simple rule, the strongest fist is the law.

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