Well, it's nice that in the English subtitles there's the explicit announcement that none of the cartoon particulars here are "related by blood," so the implied cartoon incest is made palatable to some viewers and unspeakably hot to others.
This is the story one boy's sexual dalliances with his "sisters" and it's all that we've come to expect from adult anime: hot cartoon babes who spout bad dialogue and get the bejeebers fucked out of them. Pokemon and Sailor Moon this is not.
Heck, it's not even Speed Racer.
But it's good, sleazy fun involving anal sex and lactation.
Pre-Nom: Best Animated Series.
Retailing: Animated chicks get fucked.