A few hundred years have passed since the Temma war and right now, Rimuru is very bored. When the idea of reincarnation to another world presents itself, Rimuru accepts it with a few different goals in mind. How will he live life in Japan now that he has experiences as being a human, a slime and a dragon? Not only that but also as the chancellor to the Jura Tempest Federation and the ruler to the most powerful nation in the Cardinal World. Preview: "Alright, using the skill [Space-Time God Yog-Sothoth] Do you want to reincarnate yourself into the world of Roshidere?" "Yes." "Activating" Added Roshidere because 1. Almost no fanfiction so I will create my own 2. My favorite romance light novel

All the character from tensura verse like The Octagram,The Primordial Demons/Angles,The 12 Guardian's,Veldanava and Lucia,Ciel,Adult Chloe,etc.gets teleported to a unknown room with a big black screen infront of them.....

Inside the Ruins Castle, The Great Jura forest Became bigger than before. No one dared to step foot inside or dare to claim the great Jura forest for 2000 years. The Tempest Kingdom is hidden and humans begun to slowly forget who is the ruler of this place.

The Strongest and most Powerful True dragon of all (Rimuru x Luminous) there will be a Rimuru x Shizue/Hinata but they will be all different

80 years have passed since Yuuki's defeat. Rimuru, after dwelling for countless years at the end of time and space, has surpassed Veldanava in terms of strength and is, therefore, the strongest being in the Cardinal world. With his strength, he easily dealt with the aftermath of the final battle and accomplished his dream of coexistence between monsters and humans. Although he is happy with the results, his daily routine consists of constant paperwork. During one of these boring days Ciel, who is worried about the mental state of her master, suggests creating an alternate Timeline and traveling back in time. Rimuru, not wanting to do everything over again, comes back with an alternative idea. Going back in time but with one addition: instead of traveling to his original time of reincarnation as a slime, he decides to go much further in time and become one of the ancient demon lords.