One Piece: I am Imu - Chapter 3: Star Map and Dimensional Gate!

In a world teetering on the brink of chaos, where eldritch gods peer into mortal realms and monsters stalk the land, Lu Yu finds himself moments away from a gruesome end as a sacrifice to a sinister deity. Just as the cold altar awaits him, a glimmer of hope emerges: he activates the Monster Editing System.With this arcane power, Lu Yu can extract materials from all things and fuse them to create unimaginable creatures. Each monster grants him a portion of its strength and a unique, terrifying skill. From that moment, Lu Yu embarks on a perilous game of wits and power against the ancient, malevolent gods.99 Demonic Eyes+ Cyclops Body + Primordial Chaos Stone = Chaos Evil Eye: its gaze alone spells death, obliterating all under the curse of its Mystic Death Stare.Angel’s Blood+ Nightmare’s Corpse = Holy Nightmare: a being that commands the dimensional ability Paradise Descent, fusing heaven and hell into an inescapable exile.Seed of the Dusk World+ Mutant Drake Egg = Endbringer Dragon: the avatar of apocalypse, wielding the Calamity Domain to usher in the end of all things.From the shadows, he crafts horrors beyond comprehension: Void Shadow Spider, Hundred-Armed Giant, Soul-Banshee, and Endbringer Dragon. Each creation shakes the fabric of reality itself. Even as his creations grow in power, they spiral further beyond mortal understanding, defying natural laws. The gods, once indifferent, now tremble as their monstrous rival rises.Can Lu Yu’s ingenuity and monstrous legion prevail in the deadly dance with gods? Or will the ancient, inscrutable powers crush him before his ultimate creation takes shape?The monsters are limitless, and even the gods dare not look away…

God: I shall bestow the Saintess upon you.
Pope: W- wait a moment! This is a boy!
God: That is the Saintess.
Pope: ??????

And just like that, the Saintess was raised by the church for fifteen years without any questions asked…

- Description from Novelupdates

There are countless parallel worlds beyond what we know. The people who first discovered this secret named it “Yan Fu”. Each world is a different fruit on a tree, and the person who shuttles through different fruits is called “Yanfu Walker”. Yanfu Walker is given different Heritage and trained to complete Yan Fu missions in exchange for rewards.In modern society, the Martial Arts sects have declined one after another, and martial arts prodigy Li Yan suffers from leukemia, making it difficult to survive by opening an audio and video store. One day, a person named MO appeared and took him into the Yan Fu world under the pretext of being able to cure a terminal illness. So “Hejian Skinny Tiger” Li Yan resolutely stepped into the world of Yan Fu, awakened the inheritance of Gu Huo Bird, and embarked on the path of survival in a different world. The truth of the world, Yan Fu’s goals, the secrets of the walking organization, and the ambitions of the rebel organization are far more than that…

[Congratulations! You’ve unlocked the Dimensional Motel System.][First Mission: A runaway princess—hailed as the most beautiful in the land is being hunted by her step-mother. She was originally headed to the dwarves’ cottage, but the System has rerouted her to your motel instead.][Protect her. Win her trust. And if you manage to woe her, you’ll earn her Affection Points.][Bonus Mission: Sleep with her evil stepmother to unlock more reward]'What kind of weird mission is this? And why does this story sound way too familiar?'