Fast review.
Story
The problem with this anime is that it was predictable, the story is good but predictable and in the 9th episode i knew who the sister was, it was obvious if you payed attention to the things they said and what they knew till that episode, and even in the first episodes i knew she was going to be the sister with another suspect that i had, but i knew it, was predictable so the story was fine.
Art & Animation
Being an ecchi harem anime this should have great art, but it was just good, nothing amazing or great, the uncensored parts were fine, Ikusu parts were good and funny, it was good overall, don't expect much nudes.
Sound
It was fine, the voice acting was good, but the background music was ok, the OP and ED were boring, overall was fine.
Character
Almost everyone were ok, just Miyabi and Ikusu were interesting and sometimes Konoe, but it was fine because of somethings that you will see, if you get to watch it.
Enjoyment
I enjoyed the art and the comedy mixed with the ecchiness, it was fine.
