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Dimensional Wanderer Starting with a Diary in One piece.

Evan Transmigrated to the world of One Piece, as long as he writes in a journal every day he can get stronger but when he transmigrated he almost drowned but luckily he was rescued by the protagonist Luffy. Seizing the opportunity of being rescued by Luffy, he joined the Straw Hat Pirates as a deputy captain and decided to set himself a goal he will become so strong that he can beat the three admirals to death and defeat the four emperors so that he can enjoy a lazy life. But it seemed like all the female characters had changed, making it hard for her to relax. Nami, who took the initiative to proclaim to everyone that he could only be with her. Hancock who took the initiative to propose to him. Gion stopped hunting pirates and followed the crew all day. Uta stopped giving concerts and now she just wanted to sing for him. Kaya who miraculously recovered and joined the navy. Nojiko who left her village and joined the revolutionary army It seems that this world is different from the original plot.

In a Blended World: Like the Delta Guardian

After being reincarnated into the Draconid People of Hoenn, Kaizen thought his new life would be peaceful... until he realized he'd turned into the Delta Guardian! His mission: find Rayquaza, Mega Evolve it, and save the world from a meteor shower that will destroy everything. Oh, and if that weren't enough, he accidentally awakens a love progression system that makes him grow stronger the more he falls in love! On his adventure, he is chosen by the Legendary Pokémon Reshiram and becomes the Hero of Truth. He also encounters Vermouth, whom he decides to help without a second thought. The world is still full of familiar faces: the regional champions are the Sisters Nashiro and Kurona, and his childhood friends are none other than Eriri Spencer and Ran Mouri. He studies at Shuchiin Academy, with powerful teachers like Shizuka Hiratsuka and Mafuyu Kirisu. Can Kaizen, the boy who started out as a member of the Draconid People, change the fate of the world as he wins hearts (and becomes increasingly powerful)?

Gourmet Hunter In Food Wars

Ryusei found himself transported to the world of Food Wars: Shokugeki no Soma—only to discover that he could travel to other worlds as well. Determined to become the greatest chef and acquire countless mouth-watering ingredients, he embarks on an extraordinary culinary journey. From Toriko and Hunter x Hunter to Cooking Master Boy, Dungeon Meshi, One Piece, Pokémon, Inuyasha, and beyond, Ryusei explores world after world, uncovering rare delicacies and honing his skills to perfection. With every new adventure, his mastery of cooking reaches unparalleled heights, bringing him closer to the pinnacle of the culinary world.

Versatile Mage: Starting In Soul Land.

Lin Chen awakened on the Douluo Continent ten thousand years in the future—only to be struck down by the God King Tang San on the eve of his divine ascension. Banished across dimensions, he wakes up in the chaotic world of Versatile Mage, where magic reigns and danger lurks at every corner. With the Black Vatican scheming in the shadows and the Ocean Disaster surging behind him, Lin Chen discovers a secret that could reshape both worlds: He can cultivate magic and martial spirit simultaneously. Soul and devil. Light and shadow. Two paths, one destiny. “What if I built a Spirit Hall here... and made Tang San regret it?”

Yuji Itadori Returns 68 Years Back.

In 2086, Itadori stood as the undisputed strongest sorcerer of the era, cursed with an agelessness that rendered the "high place" not cold, but profoundly empty. He existed in a vacuum of solitary peace, haunted by the names of those who should have lived: his grandfather, Junpei, Mechamaru, Nanami, Gojo, Principal Yaga, Mai, and Choso. He reflected with bitter clarity that had he possessed his current strength back then, his world wouldn't be a graveyard of regrets. Now, even Okkotsu and Maki were gone; one of the last links to his youth had withered away. Even the arrival of the "strongest alien," the bull-headed Dabura, and an army of 50,000 sorcerous invaders failed to stir his interest. To Itadori, they were merely "little Brats." Clad in his hood with hands buried in his pockets, he approached the battlefield to erase the extraterrestrial threat alongside the Shikigami, Mahoraga. But as he prepared to strike, a distortion in reality tore him away, casting him back sixty-eight years to the very day of his grandfather’s death. It wasn't a reboot of his soul; he had been deposited into the past with his original, god-like body from 2086 intact. Stunned by the familiar hospital air, Itadori looked upon the world he once lost. His presence was a tectonic shift in history. Sensing the king of curses within the timeline, he spoke with a cold, absolute authority that transcended time: "Sukuna, your head is held too high." Turning his gaze toward a phantom of his past torment, he added, "I'm sorry, Mahito; I didn't realize I needed a weaker move to keep you from breaking."

One piece God of Space.