Rimuru gets bored and decides to travel to another world. What he didn't expect was that this world doesn't have magic and is surrounded by palace mysteries and poison. There, Rimuru meets Maomao an apothecary. Together they try to uncover secrets hidden within the palace. This is after vol 23 of Tensura and the beginning of Apothecary diaries

The world once knew peace - until the Gates appeared. At first, a single colossal stone gate rose in the heart of Japan, bridging reality with a fantasy realm. But the phenomenon did not stop there. Gates erupted across the globe, each one a doorway to distant worlds beyond imagination. From kingdoms of magic to realms of demons, from hunters of shadows to soldiers of steel, beings crossed freely without warning or restraint. Their arrival reshaped societies, twisted destinies, and unleashed powers that defied comprehension. Now, as worlds collide and boundaries shatter, alliances must be forged, battles must be fought, and the fate of countless realities hangs in the balance.

The world of Remnant has always been filled with mysteries-Dust, Aura, the Grimm, and the immortal struggle between Ozpin and Salem. But one day, a new mystery arrives. Without warning, a strange blue-haired man appears near the Kingdom of Vale. He possesses no Aura, no Semblance, and no known history. Yet he effortlessly destroys a massive Grimm horde without lifting a finger. Calling himself Professor Rimuru Tempest, he accepts a teaching position at Beacon Academy. Unknown to everyone, this "human" is actually Rimuru Tempest, ruler of the powerful nation of Tempest from another world. Using his Ultimate Skill and dimensional travel abilities, he has opened a portal to Remnant simply out of curiosity. Even Ozpin cannot discover the truth. Even Salem cannot understand what he truly is. And the longer Rimuru stays in Remnant, the more the balance of the world begins to change. Because the greatest monster in another world has become Beacon's newest teacher.

A Project Moon fanfiction

TENSURA X Project Moon. What if, Rimuru became a syndicate of one of the Five Finger? "Heavily nerf or OP" you really expecting me to know power scaling? Of course not, what matter is my Agenda, to whoever I call a BUM or GOAT is what matters.

(Disclaimer: All original rights to the Mushoku Tensei franchise are reserved to the creator, Rifujin na Magonote, and this story is strictly a work of fanfiction. This project is a creative derivative and a work in progress exploring an original "self-insert" concept within the existing world of the series.) Finding death in the most unfortunate time, two brothers were graced with new life, reborn as twins to the retired adventurers Paul and Zenith Greyrats. What was once meant to be a sole journey of self-redemption has now become the dual tale of brothers bonded across time, forging their own paths in this new life. [All tags on AO3]

What if the strongest human ever ended up in the world of Re:Zero? Before Garou's radiation poisoning kills King, an unknown force transports him to another world. The strongest man encounters new adventures on his very first day, and everyone watches how easily he saves people and defeats the greatest evils time after time. No one even suspects that King is just an ordinary man. Overall, almost nothing changes in King's life. Or does it? (English is not my native language; Previously, the fanfic was published on Ao3.)

The strongest gojo satoru getting a new chance in life in another world

After a battle with Godzilla against King Ghidorah, Mothra dies. With no egg to continue the cycle, she is reborn in a new world to start life from the vary beginning for the first time in 237 million years. In this new life one will be asked to raise her properly so she will be ready for when The Great Terror arrives.

A retelling of Mushoku Tensei but if Rudeus was reborn as a female, Rudia Greyrat. All other characters maintain their original genders. Rudia thought becoming a tutor would be easy. Then she met Eris. Sent to Roa to teach the fierce young noble girl magic, reading, and manners, Rudia quickly realizes her new student is more dangerous than any spell. Between noble politics, brutal lessons, and a bond that forms through constant fighting, Rudia's second life takes another unexpected turn. If she wants to survive this job, she'll have to become more than a gifted child, she'll have to become someone worth following.