Kirisu Sensei Ga Oshieru Hokentaiiku [English, Retouched], an hentai doujinshi parodying the “We Never Learn” (Bokutachi Wa Benkyou Ga Dekinai) series, by Akapenguin

That Bokutachi Wa Benkyou Ga Dekinai (“We Never Learn”) doujinshi had good vibes ^^
It’s starring Mafuyu Kirisu, a female teacher who has a personality problem: she has a good foundation, but she’s stern and socially awkward, which makes her look rigid and also makes her unable to turn down requests. Here, she’s asked to take over a colleagues’ sexual education class, and what does our thick-headed woman do? Call Yuiga-kun, the male highschooler and main character of the series, to have sex with him, so that she may at last possess first-hand experience of the thing she will teach ┐(￣ヮ￣)┌

As sex becomes more intense, what I hoped to see happens, Kirisu becomes womanly, at long last! She stops being stern, stops pretending, and simply accepts that it feels good to be a woman having sex. A transformation worth watching for sure =)

For the rest, it’s pretty decent sex, although with too much black bar censorship to my tastes.
FYI, I retouched a little the images: grayscaling (there was a reddish tint otherwise), surfaces smoothening, and a small levelling.

Release credits are for Yukikaze D, Eli-Nyan, Obscur1ty, Kokokbeluk, Swindles and Black Dhadow, from DKKMD Translations, thank you!

I’ve got more for you: see The list of Akapenguin/Asahina Hikage’s works!

And now, the download & gallery links

Open the Complete Pictures Gallery

Or you can also use the Alternative:
Zip Mirror #1 – or – Zip Mirror #2 – or – Zip Mirror #3