The Twin Knights

From the Vertical edition

A gem from the fifties when the legendary master was most deeply involved in girls' comics, Twin Knights is more than just a sequel to the shojo manga milestone Princess Knight. More close addressing issue of station as well as gender, this one-volume tale has all the antic innocence of the early Tezuka even as it revises the more famous works' premise, doing away with the conceit of "boy and girl hearts" and invoking the vagaries of chance and power in their place.

Source: Penguin Random House API