I haven't even started the game proper, but let me say something, for anyone looking at the comments pondering whether it's worth the hefty download size. The mechanics are fun and well-done. It's not just another visual novel, there's actual game in this video, and the writing is much more literate than most things I've seen.
However. This is not why I recommend this as an experience.
I literally just now finished the tutorial. What came next had me breathless, silently shouting "What?", "What??", "This is a porn game", and, "This is a PORN GAME. WHAT?!"
Play the game.
It takes me somewhere around 40 minutes for a 1.5 GB download. Mine is DSL/wireless as opposed to fiber-optic or satellite, though. (I still think 40 minutes is OK, considering I remember dial-up...) Fot some people, 1.5 GB is no deal at all. For me, it's less than an hour so not too bad. For others, 1.5 GB means a real chunk of time. It's all dependent on what your ISP and bandwidth is capable of.