The Wikipedia description is about as apt as you'll get in one sentence. It's basically a martial arts film with pure Sakamoto-style stunt fights, interspersed with dialog scenes and some softcore erotica. Think Creed meets Koichi Sakamoto meets Skinemax.Girl's Blood (赤×ピンク Aka x Pinku) is a 2014 Japanese erotic action film directed by Koichi Sakamoto and written by Takehiko Minato, based on the novel Aka × Pink by Kazuki Sakuraba and distributed by Kadokawa
Fittingly, an apt comparison is probably Girls in Trouble. You have the same kind of all-female core cast doing lots of fighting, except without the toku and with more violence and lewdness (and legs; this is Sakamoto, after all!). It scratches the same general itch, nostalgia aside.
The movie also includes a number of toku actresses and actors in major and minor roles, including Yuria Haga (Kiva's second fangire queen) as the lead, Escape and Cmdr. Kuroki from Go-Busters, Gremlin from Wizard, Shishii from Girls in Trouble, and a few stunt actresses such as Sanae Hitomi.
Anyhow, it's not bad? I've never seen a non-toku Sakamoto production, so I don't have much of a frame of reference. The fights were fantastic, the pacing is reasonable, and the plot is thin but passable. Also, having never seen Kuroki's actor doing a less composed role, he's surprisingly frightening. And there's Escape mud wrestling, if that's your thing.