Not much info on it yet, got this from the TBS announcement page as there's no site for the show yet, but
Haruna will have her first starring role in a prime time drama this Fall.
Show is called 夫のカノジョ/
Otto no Kanojyo and will be airing at 9:00pm Thursday nights, supposed to be a lighthearted show where
Haruna as an 18 year old somehow changes bodies with a married 39 year old or something close to that.