Shishunki Bishoujo Gattai Robo Z-Mind
Japanese title: 思春期美少女合体ロボ ジーマイン
Type: OVA
Episodes: 6
Source: Original
Genres: Action
Studios: Sunrise
Duration: 30 min per ep
Rating: PG-13 - Teens 13 or older

Old school is back! And girl power reigns supreme! Ayame, Sumire, Renge, and Satsuki are charged with the protection of the Earth from a powerful new enemy. But these girls may be in for more than they`ve bargained for!

They`ll have to not only master the experimental mobile armor: Z-Mind, hold down their part time jobs, all this while keeping their lives... normal! But will this be enough to stop the forces of evil from conquering the Earth?

(Source: AniDB)