‘My life as a slime has begun.’

Before he can realize it, salaryman Satoru Mikami is reincarnated in another world. However, the form he takes on is a slime. He befriends a magical being and freely using the skills he’s acquired, the story of a slime who solves various problems begins now.

Rimuru, followed by different tribes, has defeated the army of Orcs and was attacked by the demon lords, yet they established their own nation, called the Tempest.
Making treaties with a lot of nations, Tempest readied its systems as a nation.

Rimuru heads towards the Kingdom of Ingracia, to meet Yuuki Kagurazaka, who is a student of Shizu, the grandmaster of the Free Guild, and Japanese.
In the Kingdom, Rimuru encounters 5 children, who Shizu regretted for leaving them behind, and decides to supervise them. Although the children resisted Rimuru at the beginning, yet Rimuru later successfully earns the trust of the children.

When Rimuru was returning back to Tempest Alone after separating from the children, he was attacked by another student of Shizu, Hinata Sakaguchi.

At the same time, the Kingdom of Falmuth, a nation of the west, was planning to invade the country of monster, Tempest, as they felt threatened with their trade routes and the technology that Tempest had.