Long before Rimuru and the story we know, there was the story of another at the very beginning of the world. This is their journey. Very lose creative-license was taken with this.

When Jonathan Mueller died, the last thing he expected was to be reincarnated in another world as a vampire. And he certainly didn't expect to wake up in the bed of a vampire goddess. Not that he's complaining. Oc/Harem (Female Rimuru)

There was an itch in her pants. Ever since the party was over, the itch didn't seem to go away. - Focuses mostly on anal and other fun times in Slime (Tenshura) ranging from vanilla to not so vanilla.

Rimuru was feeling bored, so he decided to go back in time and start anew. This time, he opted for a new game-plus style, retaining all his abilities and accompanied by his most trusted partner, Ciel. Basically, this is a story about how Rimuru achieved world domination, charmed multiple beautiful women, and gave headaches to Guy Crimson and other inhabitants of the world.

I never believed in reincarnation. It always seemed like a fictional concept, something hard to accept. And even if you become everything, what would you do? What would you eat? Would you help everyone, or would you forget the people you once cared about? If I had the choice, I'd choose immortality. I want to experience everything—from the food to the land.

Rimuru missed his opportunity to save the lives of those who would've become some of his first and closest friends in his new slimy life, leading to him never founding his country. Many twists and turns occur as he stumbles along, mostly alone, trying to uphold the promise he made with his sworn brother, as well as carry on the will of the woman he lost early in his journey.

“I, Ren Daisuke, thought my unconventional life would end after years of working in Special Forces and the CIA, so imagine my surprise when I died only to be a DRAGON of all creatures in a new world filled with magic and monsters under the new name, Rimuru Tempest. This the story of my adventures in the greatest journey of all time.” Tensura AU

A human soul from another world merges with a storm dragon named Veldora whose soul is weakened due to hundreds of years of confinement in "Infinite Prison" the alien soul merges with the soul of the storm dragon Veldora creating a new unity. How will the story go? (MC does not know his previous life except his own death) DISCLAIMER Tensura is original Fuse-Sensei's work.

This story is an official spinoff of Rimuru and Iruma's Adventures in the Netherworld, by me! Follow the story of Rimuru's Daughter, Aoki Tempest, an episodic story focused on slice of (s)life scenes, with an overarching plot that will be revealed more slowly.

Cryer is a wandering magic user who spends his time reading and researching spells, but after years of near solitude he comes across Rimuru in the early stages of his time in the forest and decides to watch and learn about this slime's life. Contains- OC

Everything has a balance, evil must never prevail over those who fight for justice. That is why every so often the world creates things that are extraordinarily strong enough to fight for good and for justice, Some in their infinite bravery hide in darkness, because they know that evil only retreats before that which they cannot understand or defeat.

Reborn as Ivarage following its clash with Guy and the Seven Angels, Velrage makes his mark on the world with Veldanava's blessing. (OC/SI) Patre on/HolyKnightsoftheRoundTable

Rimuru decides to bring Thanksgiving into Tempest. One shot drabble.

[FemTDRimuru] Thrown from the world by the Manas: Michael and Phantom King Feldway, Rimuru returns to a shattered world where all his friends are gone. As a result of her grief, Manas: Ciel used one of Rimuru's skills to remake the world. Now as the Eldest of the True Dragons, Worlds and shards collide into this reformed world. How will Rimuru save her new world?

A mother makes a decision to move her family to Tempest.

What if Horseshoe Crab was a woman and she had a fan club and people wanted to woo her. If that's slightly pissed off that she wanted to have a quiet day!

Luminous wants to see Hinata in a bikini but Hinata refuses the offer. Soon Luminous turns her attention to Rimuru for much entertainment despite the slime's protests.

this is how rimuru find himself in the future

Different choices were made. The one we know as Rimuru is nonexistent. Instead of becoming a slime, he became something else! With a bit of surprises. OoCRimuru, OoCShizu, No Ciel. (I'm sorry plz forgive me)

OC at their death had idly thought of being a dungeon core, the heart of the dungeon controlling how the dungeon grows. Their soul, having just enough strength to pass the barrier to the cardinal world, granted the wish. And so the OC now in the Jura forest is set to their path to be the best dungeon out there.

Luminous Valentine finds it hard to believe Rimuru was once a man in their previous life. Perhaps maybe Rimuru is just a flat girl in disguise. To test her theory she invites Rimuru and inspects Rimuru's body for herself. One shot drabble containing some light humor.

He didn't expect to meet someone similar to her... Then again? There weren't many people like him. Rated T for violence, death, and profanity. Doesn't follow series at the moment.

did you ever think when you walked outside that it would be the last time? No? Well, neither did I. But a series of unfortunate events made it so. What was more unbelievable was what came next. For death is not the end for me. When I opened my eyes once more. I was in a cave. And why was this little girl calling me Veldora? No, no, no way it couldn't be. [caution NSFW]

Charybdis narrowly survives being slain at the end of one of her rampages, and becomes sentient. After running from the Scorch Dragon that nearly destroyed her, she claims a portion of the forest of Jura, at the east of the Ameld river as her new territory, much to the surprise of some local snakes.

Join me through my various OC perspectives on how living looks like in the Jura Tempest Federation. We will see how the people doing their job and live their life in the nation ruled by our favorite king, Rimuru Tempest.