Himenoo Tsubame is the sole warrior chosen to inherit the Sacred Crystal from past Sailor Princesses. Targeted by the demon king Melkior, her fellow Sailor heroines are captured one after another, leaving Tsubame as the last remaining fighter. Worried about her comrades' safety and overwhelmed by fear, she struggles through each day. Then, a summoning letter arrives at her home, revealing she's under surveillance with no escape. Knowing it's a trap, Tsubame still heads alone to the enemy's lair to confront demon king Melkior. She unleashes the previously uncontrollable power of the Crystal, wiping out waves of demon soldiers. Regaining her confidence, she faces Melkior's next move—three elite commanders sent simultaneously. Defeated and left too weak to move, Tsubame is cursed with a body that cannot die. Subjected to relentless attacks, she repeatedly resurrects from the brink of death, enduring constant pain as she continues to fight. Under demonic brainwashing, she's betrayed and wounded even by her beloved, the Crystal is stolen from her, and finally, in a battered and broken state, she is violated by the revived demon king Melkior... [BAD END]