The first episode, sadly, is not as good as I'd like to say. The first episode reuses many scenes, and the actual conflict, Busty Mother Vs Busty Daughter, doesn't starts until the second episode... which fortunately is much better regarding variety of scenes, less repeated animation, and finally features threesomes.
Regarding Story and Characters, just read the above summary. There's your story and your characters. Nothing innovative to see here, but that's not really something against this Hentai, at least the ladies aren't as dumb as those from other Hentais.
Both ladies are quite the feast for the eyes, and the male lead is a plain-looking guy, not an Adonis, but he's no Quasimodo either. Also, TORPEDO TITS!!!
This was the first Hentai I ever watched, and although the first episode wasn't that great, the second episode made up for it. Recommended for fans of busty ladies.