Mirai becomes a superhero by accident, trapped in a suit her brother designed for himself, and spends six episodes proving she's better at the job than he ever would've been. The show treats this premise, sister outshining brother through sheer competence and improvisation, as both comedy and genuine character arc, never once letting the joke undercut her. Early 90s OVA energy means it swings for both sincere action beats and absurdist humor without apology, staying loose enough that neither one kills the other. Machinegal and his android squad give you something to fight against that isn't trying to be profound. This is what happens when a show knows exactly how long it needs to be and refuses to overstay it.

Hiroshi Ozora builds the Mol Unit, a device that renders whoever uses it invincible, and hopes to become a superhero. Those plans end quickly when his sister Mirai accidentally changes how the suit is configured. Mirai is left to protect Tokyo on her own against the evil Machinegal and his band of androids, all of them female. The six-episode OVA mixes comedy, romance, adventure and science fiction with mecha action.