Vulvaldia is a world in ruin. Rachel is a guild swordswoman taking requests as usual. Her newest job is to investigate the gate, just as she is finishing up her check, the walls are smashed, and a strange figure approaches. It's none other than Lord Charlotte, the demon lord from another world! Rachel attempts to defeat this powerful foe but is forced into submission quickly. Charlotte does take a slight interest in the girl, though, and bestows a sexual curse upon her... Just then, "Kris", a magician from that same other world appears and saves Rachel. It seems Kris is seeking to topple Lord Charlotte, but in order to acquire such power, she'll need to acquire a great deal of semen. The indebted Rachel agrees to help. Unfortunately, Lord Charlotte's plot is advancing too quickly., She has destroyed the 7 "Crystals of Desire", and a miasma of lust has swept through the world. With this new development, the pair's adventure is about to get a lot more chaotic!