What you need to know:
Nice smooth flowing animation (for the most part)
Lots of cum, drool, and ***** juice
Futanari (in one episode)
Incest
Big tits
These are deciding factors which may sway the decision to watch for some. For me these are important things to know, as you can easily avoid a big waste of time if you don't like the content.
The story reminds you of the Ring, which is funny. Instead of a tape, there is a cursed DVD, and you don't die from watching it, instead you're cursed in some horribly perverted way.
It's a unique and not so unique plot that gives us two separate stories in two episodes. The only thing each episode shares in common is that characters in each episode go to the same school and DVD has cursed the protagonist in each episode.
I highly recommend this if like hentai featuring cute succubi and especially if you like futanari. Not that much hentai with quality futanari. Koakuma Kanojo has some good futanari.