I'll preface this by saying I haven't read the original works, I don't watch 90% of hentai for story and I am a key-animation lover/appreciator. I love clean and fluid animation, something seldom seen in most hentai to the extent at which it is presented here. I have no idea what the story is here, seems like a typical BDSM dungeon but does that matter? To me? Not in the slightest. Character design is varied and enjoyable, music wasn't memorable but fit the situations they were used in if my memory serves me properly. That's the long and short of it, watch it.