The Humble Slime Who Became a Monster Emperor. In a world where humans coexist with various monster races, our protagonist, Rimuru Tempest, was once an ordinary human. After a sudden and unexpected death, Rimuru is reborn as a Slime, a seemingly insignificant monster. However, Rimuru's unique abilities and unyielding spirit drive him to become a powerful and respected Monster Emperor, inspiring unity and peace among diverse races.