Shirisugita Naka [English, Uncensored version], by Dorei Jackie

Shirisugita Naka is the simple and amusing story of an idol and her boyfriend, the boyfriend is jealous of all the other guys able to see her ass in her photoshoots, and, simply, he makes the difference by actually enjoying his idol girlfriend’s ass. Simple and nice, with a great girl deeply loving anal and eager for more carnal pleasure
It’s been released by Rhapfan, thank you!

–Update: and now, thanks to a kind person called Beastares, the manga is decensored! ^_^

(In case you need a comparison… before – after!=

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