科学者達が数十年で実現可能と言い話題の人造人間だが、まずは軍事用としてバイヤーや各国軍人の前でテストされていた。熟練した兵隊を簡単に倒し、大型ロボ兵器とも戦うバイオレプリカント(イブ)。しかし誤動作で何も知らない一般市民のもとへ飛ばされてしまう。夜中、亮はそのシルエットを彼女と混同し…Dumped by Saya Saeki on his first date, Ryo Kazama sees the form of Saya who was supposed to have gone home in anger, in the spot where the meteor that disturbed their date fell. Saya wakes up without any memories, and Ryo lies and tells her that they are a couple. Meanwhile, in a mysterious laboratory, their newest weapon went missing, and a search is being conducted. They abduct the real Saya who was on her way home. Who Ryo thought to be Saya, is actually a sophisticated combat bio-replicant, Eve.