Cosplayer heroine Ami Kaitsuki is an android equipped with an internal B.S.S. substance instant-generation device. Her existence poses the greatest threat to Tiger Claw, the organization responsible for her father's death, leading to intense daily battles against them. Sister Jiruda, a high-ranking female officer within Tiger Claw, desperately seeks to seize the B.S.S. unit that is vital to Cosplayer's survival. To achieve this, she deploys Devil Claw, Tiger Claw's elite combat robot, to attack. The robot lures Cosplayer back to her base, draining her energy through relentless strikes and crushing holds. It then releases a neurotoxic gas that heightens nerve sensitivity, amplifying pain many times over until she is completely drained. Her B.S.S. unit is forcibly extracted from her body, leaving her powerless and untransformed, subjected to brutal torture until she ultimately withers away. This worst possible ending—BAD END—symbolizes the tragic conclusion of Cosplayer's battle.