My Young Husband, The Assasin - Chapter 30: Conflict

This is the story of Long Yi, who was killed because he took revenge for the girl he loved. Before he dies, a strange lightning carries his soul into a different realm. How will he live, when the first thing he noticed upon arrival is that, the man whose body he possessed is raping the country’s princess?

- Description from Novelupdates

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

No matter how twisted the world becomes, humans will always remain humans.In the face of their doom edging closer, their greed doubles instead of fading away. Their selfishness is unwavering—they simply want everything, even at the cost of endangering those closest to them.For that is the truth of humanity.So, if everything is linked to iniquities and sins, then unlike them, I won’t shy away from these possibilities—I will embrace them.---Synopsis:Kael, a young man from Earth—a dimension renowned for its technological advancements and brilliant minds—returns on a tour sponsored by his school.But fate has other plans.A Dimensional wave crashes into Earth, mutating the entire world into a grotesque landscape of unexplored horrors.Those who survived the dimensional impact awakened to newfound strengths, while those who didn’t perished—or worse—transformed into monstrosities far more fearsome than any beast.The world has returned to the law of the food chain. The strong will endure and rule, while the weak are devoured.Kael must cling to his sanity and navigate this nightmarish new world with a mission: to protect all he has left.But things take a darker turn when the system he acquired reveals an unexpected and horrifying backlash:{Consume human flesh}{Or perish within the next 24 hours}The clock is ticking, and Kael is left to grapple with an impossible choice that could seal his fate—or his humanity.

A teenager who unexpectedly gets transported to the modern world from ‘the world of the immortals’ . He finds himself in the body of an ordinary guy. He wants to go back to his world and for that, he will have to practice to get stronger and investigate the reason why and how he crossed through to this world.