Isekai Drug ~Yakugaku Chishiki de Monster Musume-tachi wo Toriko ni shite Nariagaru~

One day, Dr. Shiro, a harmless and kind-hearted doctor of agriculture, is transported to another world along with his students and laboratory. It's a hopeless world where humans are treated as slaves and ruled by monster girls! In this grim world, he'll use his knowledge of pharmacology to subvert and control the cruel monster girls!