That Time I Got Reincarnated as a Slime: Trinity in Tempest

This Spinoff Manga has content based starting from Volume 4 of the Light Novel.

Against the odds, the little slime Rimuru has established Tempest, his magical country for all monsters, and it’s thriving. Three visitors, Phos the fox girl, Stella the dragon girl, and Nemu the winged girl, come to pay Tempest a visit, and they’re stunned at just how quickly it’s developed.