I watched the 1st 7 episodes and surprisingly for a show full of perversion I didn't like it that much at 1st, but it quickly grew on me. Before watching I thought it was gonna be about some stupid teenager full of hormones trying his best not to fuck his stepsisters but it turns out it's not entirely the case. He even gets really close at some point but gets cockblock by the other sister so in the end the result's the same, no nookie.

After 2 episodes, although I liked it, I didn't think it was great. I guess I was expecting it to be more funny. But it gets better and in episode 5 even though I wasn't too sure about the whole
piss thing, when Keita smelled his hand and she smacked him on the head with her wet panties
I was sold.

Most of the characters are funny, like that crazy perverted stalker-loli, I bet a lot of guys here would love one of those but I prefer Miharu and the otaku-sensei of course. Also their parents are really creepy, I thought they were gonna give them condoms and lube and leave the house at some point or maybe I was just hoping for that to happen.
So far, it's a very good show overall, definitely not something I would rewatch but still entertaining for the most part. I'll probably watch the last 5 episodes tonight and then look for those OVAs you guys were talking about. I'm in need of more "incest".