... wow, it has been a while since I've come across a VN where I can't use meta terms to explain everything.
If I had to put a genre type to this, it would be 'random/comedy/ecchi'. There are a few really unique elements to this VN that I should probably explain before I go any further. First, narration in this VN is almost nonexistent... roughly 98% of the game's text is dialogue, though the h-scenes are narrated. Second, this VN makes no attempt whatsoever to be serious at any point. I'm not kidding. There are literally no serious points in this VN (I at first disliked it, then when a stuffed penguin appeared with the same brand of beer my father drinks in hand, I completely lost control and started rofling).
... which is its attraction. This VN feels a lot like an eroge-version of an American cartoon of the same type as the Simpsons or Family Guy, right down to the movie references and low humor (repeated jokes, sex humor situational comedy, and jokes related to defecation and other weirdness). There are also a huge number of old American movie references (mostly 1980's to the turn of the century) and a few references to TV shows that were old when I was born, such as the Lone Ranger. To be honest, this VN is all over the place...
This VN is immensely fun if you are fine with the kind of insensitive, low humor that is common in the American cartoons I mentioned above, as well as Japanese humor. However, if you don't like that kind of thing, this will probably be pure torture.
PS: All the heroines are bisexual.