Nukitashi the Animation Specials are short special episodes on the Blu-ray; four episodes at five minutes each. The format is basically Jun having sex with four girls in his dream: 1) Hinami, 2) Misaki, 3) Nanase, and 4) Fumino.
I gave the main series a 6 out of 10 because I like the message it gave regarding the difference between coercion and noncoercion regarding sex. These specials have nothing to do with that. Jun's heart belongs to Nanase, but it is shown that he is also having sex with three others. Even if these occurred in his dreams, it contradicts the message of the main series. That's why I gave it a 2 out of 10.
It's fine if you are gooning, but even then, it's not even good. Jun doesn't even talk during the sex acts. I can't help but feel that these specials cater to the female gaze rather than the male gaze, which is the usual assumption. It feels more like a hentai that females would enjoy watching more than males.
These hentai episodes have no plot. I recommend Guilty Hole as the better hentai. Guilty Hole doesn't have a plot like this one, and it also takes place in dreams. But I can at least guarantee that it caters more to the male fantasy than this one.