In the opening episode, Yuuri is selected by her teacher Suzune to become an Angel Goddess and defend Earth from invading demons that feed on unleashed desire. She undergoes careful training to master her new powers and resist the creatures' corrupting influence. Once Suzune judges her ready to battle alone, a powerful new demonic entity appears and quickly overpowers her defenses. At the same time, her gym instructor reveals himself as an unexpected and deeply unsettling threat.