Manga Volume 9

 is the ninth volume of the manga adaptation of That Time I Got Reincarnated as a Slime.

Synopsis
RIMURU THE DIPLOMAT

At the suggestion of Demon Lord Carrion, Tempest and Eurazania have sent delegations to each other in the hopes of finding a fruitful exchange. Benimaru leads the mission from Tempest, and from Eurazania is a party led by Albis the Golden Serpent. It seems as though trade might begin to flourish until the members of Eurazania's delegation bristle at Rimuru. Can our gelatinous hero manage to get on their good side and be the glue to form a friendly bond between two nations...?

Chapters

 * Chapter 40: Trade with the Animal Kingdom
 * Chapter 41: King Gazel's Invitation (Part One)
 * Chapter 42: King Gazel's Invitation (Part Two)
 * Chapter 43: To the Human Kingdom

Bonus Short Story
 * Veldora's Slime Observation Journal: Diplomacy