Kachou Souma Souko [English], by Mizuryu Kei
An endearing slut. So candid, so spontaneous in her sluttiness she sees no problem with being absolutely open about it. She may be abusing her position of power at her company, she may be bad for the health, but, still, it’s impossible to hate her. Dear hentaiers, the older sister in the Souma family is back at her old job, and her colleagues fear for their health
I can’t promise you visual marvels, even when the mangaka is Mizuryu Kei, there’s whiteout censorship. But I can promise you it will look very good already, and I’ll add a high chance it will make you smile, it was amusing to see a story in which the ones trying to back down and avoid sex are the men
Thanks to Cgrascal for this one! ^^
A quote, I wouldn’t want you to miss it:
– Sex really is the only thing is good at…
– Heh heh! I was praised! I’m so happy!
If it can help, we meet the Souma family members in Teisou Kannen Zero, Souma Kurumi no Idenshi – Kurumi’s Gene, and Souma Ikka No Halloween + Souma Taxi.
For more, see the list of Alice No Takarabako’s (also known as Mizuryu Kei) works on Hentairules…
And now, the download & gallery links 
Open the Complete Pictures Gallery
Download the Free Hentai Manga in a Zip file
(14 MB, 22 pictures, English)
Or you can also use the Alternative:
Zip Mirror #1 – or – Zip Mirror #2
The Orders Of The (*cough-cough*) “Manager” Are … ABSOLUTE!
http://s2.quickmeme.com/img/7c/7cf1163ffe1476cda9dc318da86b7178880dffc9b502ed340a8d7e117914e618.jpg