Fourth season of Strike the Blood.

It was announced at a Dengeki Game Festival stage event that the Strike the Blood light novel series will get a third OVA release. It will cover until the end of Seisen-hen. (Source: MAL news)

A mysterious organization known as Panther Claw make their presence known by terrorizing Tokyo and giving the cops a run for their money. Police are further baffled by the appearance of a lone cosplaying vigilante who thwarts all of Panther Claw's evil schemes before disappearing. That cosplayer is Honey Kisaragi, the result of the late Professor Kisaragi's prize experiment. A master of disguise, Honey can magically alter her physical appearance and outfits. But with a push of the heart-shaped button on her choker, she transforms herself into Cutie Honey, the scantily-clad, sword-wielding warrior of love and justice. (Source: ANN)

Shou and his friend, Tetsurou, stumble upon a strange orb-like mechanism, the Guyver Unit, in the woods. It physically bonds with Shou and turns him into the alien soldier, Guyver. His mission is to protect the Guyver Unit from the Japanese corporation known as Chronos. They are after it and two other units just like it. To retrieve the object, they send out vicious monsters known as Zoanoids. So no one is safe in Shou's life; not even himself.