On the day Sailor Aquas (Minatsu Mizuki) went on a school trip, monsters launched a surprise attack. As one of the most composed and strategic Sailor Prism Warriors, she is not easily defeated. However, her weakness lies in the moment of transformation. The monsters exploit this opening, isolating Sailor Aquas. The battle turns brutal, gradually breaking down her mind, technique, and body. The Demon King appears, captures her, destroys her sacred brooch, strips off her Sailor uniform, and takes everything from her. All that remains of Sailor Aquas is her shattered willpower. Yet she refuses to give up. Is there a way to turn the tide? How will she claim victory? [HAPPY END]