Reina Highbranch is a pioneer of a new branch of alchemy that makes use of various species' sexual secretions as a primary ingredient. Being the promising and gifted young alchemist she is, Reina is tasked by the Grand Alchemist of the Witch's Academy to set up an atelier in Vessyra, a religious city worshipping the goddess of love and lust, deep in the forest of southwestern Talmora. There she will begin her journey to become a renowned alchemist.

*This is a sequel to Ellori, the Ero Witch of Parthun