Oh man, every chapter there is less "action".
- First chapter he filled the middle sister with lots and lots of "love".
- Second chapter he filled the older sister with "love" only once.
- Third chapter he didnt even fill the little sister with "love". Well, since she is the youngest maybe headpats are better? xD
2 chapters left. I dont think he is gonna NTR his father (aint even thinking about the opposite) and there is still the orgy left. Guess in the next chapter the others sisters are gonna know that he has bangged all three of them and in the last one is gonna be fuckfest time.
About the hentai conflict... For real, i think there is only two types of people who would consider this hentai:
1- people that have never watched/read hentai.
2- people that think everything sex oriented is hentai.
There is no way that someone who has been in the manganime community for some time would think this is really hentai.