Level Eater - Chapter 76: Conversation with a Merchant

Leiyin accidentally crossed into the One Piece World, and accidentally obtained the Naruto System.

Jiang Pengji got something called the Court Intrigue Stream System.
System: “Your goal is to become the most prestigious woman in the kingdom (the Queen)!”
Jiang Pengji: “Okay, System. No problem!”
Years later, she met the target by becoming the most prestigious woman (the Empress).
Jiang Pengji: “Well done, no?”

- Description from Novelupdates

MC: Whoa there, hang on a sec! Don't say anything yet, let me first trick this stupid goddess into giving me more abilities!Some time later (and some psychological abuse)…Aqua: Okay, you win! Pick your skills! And fast!MC: Alright, check this out! I'm snagging〚World Traveling〛and〚Analyze and Copy〛! Sweet deal, right? Hahaha, I'm gonna be unstoppable!

“What kind of guardian would you want to be? the one who destroys everything or the one who protects everything?”

Jason, one of the many casualties during a nuclear explosion gets the chance to reincarnate into another world due to his deeds during the war.

He gets tossed to another world due to ending up with the Shadow god as his patron, something deemed impossible.

With a system to guide him in the world of Clover and a family jinxed through the generations, his adventurous life in new world begin.