Okiniiri [English], by Tsukudani
“It’s very hard to find a good dick! If we don’t find one today, it will be sensei’s fault, you know?”
Apparently, keeping two gyarus after school to scold them for their suspicious activities was a bad idea. Or a good idea, that would depend on the point of view
The drawings had a pleasant, unusual touch, I’m not too used to all these idiosyncrasies (like a girl with short hair and slanted eyes? Nice!), reading Okiniiri was a refreshing change
I’ll let you find out the rest of the details, enjoy, and thanks a lot to Draw99Gray! ^^
Oh, also: I joined two of the pictures, but forgot to add it to the .zip archive, if you want, you can download it directly.
By the same artist, to this day, I also share Kikyou and Otou-san To Wa Yobitakunai.
And now, the download & gallery links 
Open the Complete Pictures Gallery
Download the Free Hentai Manga in a Zip file
(16 MB, 24 pictures, English)
Or you can also use the Alternative:
Zip Mirror #1 – or – Zip Mirror #2 – or – Zip Mirror #3
So, after *koff-koff* “correcting” his gyaru students’ wayward ways via the unintentional application of his “tower of power”, how might we classify Tatsuda-sensei – LUCKY Bastard or UNLUCKY Bastard?
I say there are actually sufficient grounds for classifying him like this:

Very Tamagoro-esque, I like it.
Not similar to Itosugi Masahiro?
Wonderfully creamy.
Aizawa?!?