The tags are confusing, so... let me clear this up.

Its not futanari x futanari.
Shimakaze is a boy, therefore yaoi is true due to the Admiral fucking him.
Nagato is a futa, thats not gender bender, thats dick growth.

On another note- i don´t think you could ever fit a penis inside another penis, no matter the size difference.

Base +7, Kodomo_P -6, SCSS +16, uca1 -7, pomf1 +9, kamonaku -6, Madrusger -5, 185484 -6, lmaoplane +7, alteleric2 +8, ExRumia -8

@Darkestvamp
I think the genderbender tag was added because of Shimakaze being male.

Base +7, SCSS +16, pomf1 -9, Brickster +19, sdfsdf0 +8, totlmstr +7, DoubleChaos -7, Dima979 +5, ExRumia +8, Hyoros -12

http://www.doujinshi.org/book/813051/

Base +27, pomf1 -9, DoubleChaos -7

Shimakaze-kun being dominant is a nice change of pace. Boning and taking charge with a futanari Nagato is even better.

Base +11, pomf1 -9, ilwaz +8, Benny-boy +19, SCSS +16, totlmstr +7, D. Hart +6, zft19950727 +6, Noroki +5, DoubleChaos -7, alteleric2 +8

@Darkestvamp. You are wrong in the case of male:yaoi. It is not valid because it fails presence rules as its only 1 page http://ehwiki.org/wiki/presence#Presence Content have to have enough presence in the gallery to be tagged.

tldr: Down male:yaoi

Base +23, Mrsuperhappy +12, 185484 +6, DoubleChaos -7, Ibaraki Kasen +2, ExRumia +8

Only one page of Shimakaze-kun riding the dick?
What the fuck am I reading.

Base +6, nunchuck +6, DoubleChaos -7, malikski +6

so good,i like it

Base +8, DoubleChaos -7