Now _this_ is a proper game: superb plot and character development, a fully-realised world with its own rules and logic, and believable relationships.
Don't go in with false expectations, though. This is not good fap material, yet... nor is it even particularly erotic at this point -- but the dev is setting things up very well for a turn in that direction quite soon. There appear to be meaningful choices, as well.
Visually and in terms of the slow-burning, erotic plot development, it is quite similar to the Dev's previous work, _Life with Mary_. In other words, don't expect animations or cutting-edge graphics. But _do_ expect the slow-buring plot to pay off eventually.
One of the Dev's few faults as a storyteller is that the protagonist can seem a bit robotic at times... I've always assumed this was an English/translation issue. There are few grammatical errors, but the dialogue can seem somewhat stilted. Fortunately, these quirks asctually work well in the context of the vampire setting, in a way that was not true with _Life with Mary._
The bottom line is that _Rebirth_ seems to be another step up for the Dev, following his very good first game.