Sukeban Deka Season 2: Shojo Tekkamen Densetsu

Following the end of the first series, Godai Yoko is a mysterious girl who grows with an iron mask to protect her life. She takes on the identity of Asamiya Saki after being freed from her mask and becomes the second "Sukeban Deka" in order to discover the responsible for her wasted childhood.
She will get the help of two other non-official Sukeban: Nakamura Kyoko (“Okyo”) and Yajima Yukino.
~~ Adapted from the manga series "Sukeban Deka" (スケバン刑事) by Wada Shinji (和田慎二).