Saibiyaku ~Miseijuku na Shoujo o Hatsujou Saseru Kusuri~

Unattractive and trapped in his career, a company man turns to drugs. Not on himself, but on high school girls. The drug is "hypnodisia", inducing estrum in girls who sate their lust on his c*ck. They might resist, but the instant effect of the drug makes orgasmic slaves of the pretty girls. Who knew this sort of life was possible......