The sailor heroines fought every day to punish the monsters who lived in the darkness. However, one day, their brains and student council president Momoka, Sailor Aqua, was turned evil by the monster Camerada and became Evil Aqua. Desperate persuasion by fellow disciplinarian Sailor Volcano, also known as Yuka, is in vain, and Sailor Volcano also falls into evil due to Evil Aqua's scheming. The evil demon's hand was about to extend to the third sailor heroine Ayaka. [BAD END]