Bannou Bunka Neko-Musume DASH!
English name: All Purpose Cultural Cat Girl Nuku Nuku Dash!
Genres: Action, Comedy, Romance, Sci-Fi, Ecchi
Type: OVA, Episodes: 12
Aired: Sep 23, 1998 to Dec 23, 1998
Studio: Ashi Productions
Source: Unknown
Rating: R - 17+ (violence & profanity)
Synopsis:
It's in the not too distant future. One day Nuku-Nuku dropped in and began to live with the Natsume family. Having lost her memory, Nuku-Nuku assumed the identity of a beautiful girl named Atsuko Higuchi. She was so beautiful and gentle, and besides, she was such a great cook that Ryunosuke, 14, was all smiles. However, after her arrival in town, a series of mysterious incidents started to happen in Maneki City - Experimental machines running haywire, roaring fighter aircraft flying low, mass destruction in the city. In every case, a mysterious girl was spotted at the scene of the incident.

(Source: AnimeNfo)