This particular series is so difficult to peg due to the constant and (mostly) effective jokes and parodies that show themselves across the series. It is not necessarily something that is entirely erotic, the jokes are sometimes too funny to ignore and continue the erotica aspect. It is better for reading as a comedic piece than it is as real erotica, however it can pass off as great for both purposes.
Base +5, Tofu22 +2, Megazord0h +6, Invisibleguest +6