I was in for the shock of my life when, in the middle of its 10 episode run, Kaya Kiyohara drama Reibai Tantei Jozuka Hisui abruptly ended at the end of episode 5 and said the series was CONCLUDED, but at least now I know why Fuka Koshiba was in this drama in such a diminished role in the first place!
It seems the show will pick up again under a brand new title and set-up, called Invert: Jozuka Hisui Toujoshu, and in THIS one, Fuka's role is dramatically larger, at last the true "partner"to Kaya, at least if the sneak previews for next week (and her larger representation in the promo pic, as seen below) are any indication! 
VERY EXCITING!!! I love the unexpected, and I've never saw a drama pull the RUG out from under us like Jozuka Hisui did!!! can't wait to see where this drama is GOING!!!