I can't speak Japanese but this is really a nice doujin imho, one of my favourite Evangelion ones. Yui's Plug Suit is actually wrong since in some cutted NPC scenes in episode 23 (the "Reiquarium" scenes:http://wiki.evageeks.org/Analysis_of_the_Episode_23%27_Reiquarium_Images) she's shown having a "Dive Suit" with a pair of little wings but other than that it seems to make quite interesting statements; after having done "that" apparently Yui asks to Gendo about the name that he decided if Shinji were to be a girl and she seems to be dreaming about having a daughter; after the contact experiment (and her last "aisheteiru" for Gendo) it seems that inside the entry plug there's a fertilized ovum and that left me speechless because just a pair of days ago my brother was talking about something similar, Rei being really Shinji's sister and not the clone of her mother. Surely it'd be nice to understand the plot a little better.
The drawings maybe aren't the better I've seen from the kohakutei circle, some later doujins are much better but it's not that bad either and I really like their "cute" sex scenes (I don't like it when there's violence and similar things) they move me a lot, we'd really need more Yui's doujins not those ones with Gendo fucking Rei.

Base +7, ZAZAAZ +8, dirtyhairry +8