2005. Spin-offs Wada published two short stories set in a parallel universe in the October 1998 and May 1999 issues of Hakusensha's Melody magazine. He published two more installments in the March and April 2003 issues of Media Factory's Monthly Comic Flapper magazine. Media Factory later collected the chapters in a volume titled , which they published under the MF Comics imprint on June 23, 2004. In 2021, almost a decade after Wada's death, Akita Shoten launched three spin-off manga series in Monthly Princess magazine. The first, , is written and illustrated by Saori Muronaga. It premiered in the February 2021 issue of Monthly Princess on January 6, 2021. The second, , is written and illustrated by . It premiered in the March 2021 issue of the magazine on February 5, 2021. The third, , is written by and illustrated by Shingi Hosokawa. It premiered in the September 2021 issue of Monthly Princess on August 6, 2021. Television series The television series, though technically one series made up of three seasons, are essentially self-contained and separate, aside from sharing the same basic themes and premise, and starring popular Japanese idol singers in the main roles, each one replacing the previous as the new Saki Asamiya, taking on her cover identity and yo-yo weapon. Sukeban Deka, the first series from 1985, starred Yuki Saito as the titular character Saki Asamiya. Saito's own song "Shiroi Honō" was used as the theme song. Actress Yasuko Endō played Ayumi Mizuchi. Lasting 24 episodes, the series adapted the first part of the manga and was relatively faithful to it, only changing minor points, though it deviated more towards its conclusion. Unlike the manga, where Saki died at the end of a late arc unrelated to the Mizuchi sisters, the series produced an early ending in which Saki seemingly died in a burning building along with her enemy Remi Mizuchi. The popularity of the first series allowed it to be followed up by in November 1985. This sequel starred Yoko Minamino, as Saito chose not to return in order to focus in her singing career. In accordance, although the series did base most of its storylines in the second part of the manga, Minamino portrayed an original character named Yoko Godai, a mysterious girl from Kansai forced to wear iron masks for most of her childhood. Yoko was liberated from the mask by a police agent