Ooku would have had me from "AU history of the Tokugawa shogunate" or "serious exploration of gender role reversal" alone, even coming from a totally unknown mangaka. Both elements together, and from Fumi Yoshinaga, who has a ridiculous track record of even managing to take tropes I dislike or am actively squicked by and making them work? I do not have words, capslock, or sparkletext sufficient to convey my overwhelming squee.