Tale of android after the Apocalypse

Niluas, an android who suddenly activated 276 years after the extinction of humanity, had somehow lost her memory. Together with Naive, her integrated support AI, she sets out to explore her lost memories, the mystery of her activation, and the mystery of humanity's extinction. While battling mysterious figures who suddenly appear and attacking androids, what truth will she uncover? [What kind of game?] Explore a world after humanity' extinction and uncover the truth behind lost memories and the...