If you looking for a great yuri-only eroge then my friend you found it. Brilliantly drawn, gorgeous "cast", a bit like winning a lottery. Too bad that not much of such stuff is released.
I just like to point out, however late though that there's no actual gender bender scene in this VN. What you see in pic 5-6 is MC getting fake boobs. IIRC The scene depicted on pic 7-10 is the MC getting his balls and his dick pushed (as in literally) inside by one of the girls. If you would examine the other pictures he occasionally pops his dick out when the situation arises and later pics show even his balls (pic 291 onward). Please remove the gender bender, futanari and shemale tags and add a crossdressing tag.
And also if you would check the getchu site: http://www.getchu.com/soft.phtml?id=577525&gc=gc It is categorized as: Close relatives, Idol and Harem. It's missing the usual gender bender tags such as 性転換 which is sex change and 女体化 nyotaika.