She mention Miina and Yuuki from the last two works of Eguchi Jaws. So there are rhe same universe then. (The other two chapters also mention that these three are friend too)
I heard Vanilla does wonders for that description.
They do say absence makes the heart fonder, although in this case they still do meet each other and they just hold off on sex. Really, they may as well be going at it everyday.
That ending though. Well...6 years, eh? True protagonists are turned on by their girl anytime, anywhere, forever. It's a good start though, so I see potential in this guy.