I actually wrote a review of it for MAL (the first review I've ever written) just because it's so completely unlike anything else.

The thing that amazes and impresses me is that it somehow manages to be sweet and wholesome underneath all of that. In a way, it's not even raunchy. I mean, it is, and very much so, but at the same time, they're so open and straightforward and honest about it all that it doesn't seem that way. They're just sweet, wide-eyed innocents, falling in love and building a relationship, regardless of whether the topic at hand is sharing an umbrella in the rain or having sex 30 times in a night.

And it makes me laugh regularly, just because, just like this chapter, it'll go along for a while, being normal and sweet and simple and wholesome, then BAM! - it drops something just astonishingly depraved right in the middle of it all. And it's just that much funnier because Ino and Rintarou never break character - again, they're just normal and sweet and simple and wholesome, even though it turns out that they're talking about something astonishingly depraved instead of any of the things one might expect in the same situation in any other manga.

It's like those two families are perfectly ordinary... non-humans. As if unbeknownst to everyone, they're descended directly from the Greek gods or something, so all of the normal human rules just don't apply to them and their appetite for everything, including sex, is insatiable. But other than that, they're just ordinary people, going through all the same things everyone else goes through. Sort of. Though not really. But still sort of...