On orders from Emperor Igil of the Demon Killer Realm, the elite female assassin and demoness Poisony begins her invasion of Earth. A confrontation erupts with Spirit Force, the human organization formed to oppose the Demon Killer Realm. Poisony develops a special ray gun designed to target Blue Dragon, a young warrior who struggles with teamwork. However, her weapon is meant to disable transformation abilities, which proves ineffective against Blue Dragon. Now, unable to transform, Blue Dragon falls victim to the demoness's seductive and merciless torment. [Female Officer Happy End]