Quite honestly one of the worst hentai I've seen. The protagonist's father is gone for work and the protagonist stays home with his horribly designed sister. Apparently his sister is a semen-hungry succubus who wants to have sex with him. Good so far? THE ART IS AWFUL. I read in another review that a reason you might not like it is because of the succubus or the big boobs. No, no, no! Brandish had a loli succubus that was plenty a gifted and she was pretty cute, in this case there's just something wrong with the design! What is supposed to be a younger sister is designedwith the face of an adult woman with lots of make-up (and obviously disproportionate chest size) stack to a relatively tiny body. The result is pure ugly to look at.

And don't get me started on the "succubus" parts. Quite honestly this is the first time I've seen horns on girls in anime that look SO bad. The wings are also a joke (way too badly designed as well), to the point that they remind IN-ANIME of a lazy cosplay. And to top it all off for some reason both the wings and the tail are a stupid purple-black color that just looks fake even by anime standards.

And to top it all off: The voice acting by the sister is horrendous. How can I say this... It's like an adult trying to mimic the voice of a child. "But that happens in all anime." you will say. Yes, I know, that's why it's so hard to describe. The whole thing just sounds WRONG here. It reminds me of when adult women in anime purposely try to sound teasing, except in this case instead of 1 or 2 lines it's the entire episode. It sounds FAKE.

Pros:
-...I got nothing.
Cons:
-Good god the art is awful.
-The voice acting by the sister is really annoying.
-They managed to make a non-tsundere little sister annoying.

Stay away.