For a hentai, its great. The story is simple like any other Hentai but very arousing due to taboo factor of incest. There are very few incest hentai episodes out there. The idea of two siblings doing it each other like rabbits in the presence of their sister in the same house, is simply a turn on for me. I watch it from time to time and fap to it. If a hentai makes you do that, then you are watching a quality one.
The story and sex scenes are great. The best character in the hentai is the Loli character. The art style is some what old but very pleasing.