Himitsu Dolls

 (秘密ドールズ) is the first collaboration single by Nakahara Mai and Shimizu Ai. It, and peaked at #42 on the Oricon single chart.

Single Information
The lead track Himitsu Dolls was used as the first ending theme for the anime Strawberry Panic!.
 * Catalog Number: LACM-4263
 * All Lyrics: Hata Aki
 * Composition: Okubo Kaoru (Track 1), Oka Naoki (Track 2)
 * Arrangement: Okubo Kaoru (Track 1), Oka Naoki (Track 2)

Tracklist

 * 1) Himitsu Dolls (秘密ドールズ)
 * 2) Kajitsuteki Borderline (果実的ボーダーライン)
 * 3) Himitsu Dolls (OFF VOCAL)
 * 4) Kajitsuteki Borderline (OFF VOCAL)