Long ago, on the desolate planet Savian, covered in wastelands and deserts, Arisa is ambushed by the Cloud Oni's water attack and driven to the brink of collapse. Coming to her rescue is SL Queen Maria. However, the demon drags Arisa deep into the desert and renders her unconscious at its lair. Covered in mud and soaked to the bone, Arisa is immobilized by dark magic, left completely at the mercy of the demon's cruel desires. Under the influence of a red mineral, she undergoes a grotesque transformation, becoming Evil Arisa and turning against Maria. As Maria desperately tries to save Arisa through physical contact, she herself falls prey to the demon's lewd and perverse temptations, gradually succumbing and becoming a willing sacrifice.