The protagonist of this story is a princess from a small island nation who secretly works as a journalist for a publishing company. Known by the name Asuka Nekomiya, she operates at night as the phantom thief Brilliant Cat, stealing valuables hidden by criminals and delivering them to the poor. Her actions symbolize the battle between justice and evil, inspiring courage in many people. However, her current target is a far more powerful enemy than any she has faced before. She falls into a trap, is captured, and subjected to intense torture that pushes her to the brink both mentally and physically. The torture involves electric shocks delivered to sensitive areas and methods designed to induce extreme pleasure, ultimately breaking her mind and leading her to climax and ascend. During this process, a character analysis computer exposes her true identity as the princess. As a result, Brilliant Cat herself mentally collapses, convulsing and squirting uncontrollably until she finally reaches a fatal climax. This is the most tragic BAD END in her story, where, in the end of the battle between good and evil, she becomes a sacrifice in her own fight to uphold justice.