“In accordance with his father's will, Shougo Mikadono transfers to the school that his future wife is said to be attending. But also attending the school is Shougo's younger sister who was separated at birth, and he doesn't know what she looks like - but she attempts to get close to him without revealing who she is! Can Shougo figure out which of the girls at this school is his sister and find his destined life partner at the same time?”
Crunchyroll Licenses: Nakaimo Is Among ThemWritten by SolidX
If you're still working on the mystery of "Who is IMOUTO?" you're in luck. Crunchyroll announced yesterday that it has obtained the simulcasting rights to NAKAIMO ~ MY LITTLE SISTER IS AMONG THEM! which is the official english title for Kono Naka ni Hitori, Imouto ga Iru!. New episodes will go up on their website every Friday at 11:30pm EST.
If you haven't checked out the series yet through means we will not speak of, you can check out the official synopsis below or perhaps you'll find our first impression to be more useful.