Naruto System in One Piece - Chapter 18: Big Ball Rasengan

In humanity’s final war against the Demon Lord, the strongest heroes fell—not by the enemy’s hand, but by their own, twisted into madness by a cruel illusion. Betrayal. Bloodshed. Despair… and then, silence.Only one person remained: Riley—the weakest warrior of them all. Powerless. Ignored. Forgotten.But he saw through the Demon Lord’s deception. The tyrant was on the brink of death—so weak even a fly could’ve finished him off.And Riley did just that, drawing every last ounce of strength to bite off the demon’s head.Victory? Not quite. A final, desperate strike from the Demon Lord pierced him from behind, killing him instantly.But fate wasn’t done with him yet.Riley awoke ten years in the past—when the online game [Apocalypse] was launched. Before demons descended. Before monsters overran the world.And this time, he wasn’t starting from nothing. He had a decade of experience—and a second chance.Even more shocking, he didn’t awaken his old D-rank Strength Boost talent. This time, he received something far more terrifying: an SSS-Rank Gluttony talent!He could now devour anything—monsters, items, talents, even traits—and gain their power.Ding![You have devoured: Iron Fang Wolf][Acquired: +4 Strength, +2 Agility, Skill: Bite (F-rank)][You have devoured: Goblin ShamanAcquired: +8 Intelligence, Skill: Mana Bolt (E-rank), Talent: Minor Spellcasting Efficiency][You have devoured: Flaming Salamander Drake][Acquired: +22 Endurance, Trait: Dragon’s Resilience, Skill: Flame Breath (C-rank)]Now, there is no demon, no god, no monster who will stand in his way. He will devour everything—and save the world.But the power of Gluttony was a double edged sword. If he wasn’t careful… he could be the one getting consumed.

500 years ago, Chen Xi was devoured by a crack in the void and was transported into a cultivation world.

500 years later, he returned back to Earth after enduring through several hardships and discovered that only 5 years had gone by.

…

In the courtyard, beauty at the side, a candle flame wavering.

A gush of clear wind, half a full moon, the peach tree remains unchanging.

…

Wait, whose kid is this?! Why is she calling me papa? Gazing at the little girl in front of him with skin as pale as jade, Chen Xi froze.

…

　
Returning home from cultivation, starting as a stay-at-home dad.

In this life, not fighting to be a king nor claiming to be a tyrant, only praying to peacefully be a wife-pampering mad devil and a child-protecting daddy!

- Description from Novelupdates

In the Year 2030, the ground-breaking online game «Divine Realm» shook the whole world. Its system of allowing players to exchange in-game currency into real-life money attracted everyone’s attention.

He Miao transmigrated into a book, becoming the ugly, foolish female supporting character who behaved crudely, no thanks to being raised in a village. She kept hovering around the male lead and eventually provoked the female lead, who had a System, and was cheated into losing her company shares. Her own father married her off to a violent, abusive husband, and she ended her life as cannon fodder due to one of his violent fits. To avoid that tragic end, He Miao made two choices. The first was to escape the He family as soon as possible, while the second was…

Asking the male lead out for a meeting, she told him, “I don’t love you anymore. Let’s annul our engagement.” Jing Yan, who was still racking his brains on how he could get away from her annoying presence, exclaimed, “Are you serious?”Seeing that he was distrustful, He Miao took out the engagement gifts and stuffed them into his hands, ignoring his scornful reaction as she turned to leave. The annulled engagement meant half of her previous tragic fate was avoided, which improved her mood considerably. Hugging the little dog she adopted, she peppered it with kisses in her cheerful spirit, ignoring the fact that it stiffened in her arms…

Still, it started to act weird recently as it would run circles around her in the morning while throwing a fuss at night and trying to run outside, even succeeding a few times. He Miao consulted many veterinarians and experts on the matter, but she did not know that the dog’s rebellious attitude was because Jing Yan’s soul had transmigrated into it! Everyone knows that Jing Yan’s fiancee is an ugly, stupid, annoying village bumpkin who bugged him every day.

But she was at least tactful enough to annul their engagement. And yet, the same Jing Yan who had always acted high and mighty knelt in front of a fairy-like girl to help her put on her shoes as he asked unhappily, “It’s already been so long… Can we get engaged again already?”Everyone stared blankly, dumbstruck. Wasn’t his fiancee supposed to be ugly and stupid? She’s clearly enchantingly beautiful! Who spread those rumors in the first place?!