This hentai has absolutely no story. The characters jump right into the sex and to be honest, it's quite jarring. They would have been better doing a few tease scenes or at least something before they have sex. These two sisters start fucking their little brother just because. He comes home and the first thing they do is fuck him even though it's made very clear to the audience that this was the first time they did this. This was not very nice to watch. I wouldn't recommend. However, if you're looking for an onee chan hentai with a story I would personally recommendSeikatsu Shuukan The Animation. There are two 30 min episodes and it's a very enjoyable hentai.