Yeah, although I was hoping there were enough fervent fans on the Japanese side to correct such a blatant error on Japanese Wikipedia, since that’s what Wikipedia seems to be good at. Sadly, I did not subscribe to DTM Magazine; I only have two issues, and they were around the time CV01 came out.
Harukaze Dori ni Tomarigi wo 2nd Story has yandere twincest in it.
It also has a yandere single mom (heh…) who doesn’t like the fact you’re boinking BOTH her daughters. Sadly there’s no family foursome. I guess that’s would be for the omake fan disc. 
EDIT
Just got to see chapter 16 today. I think I see Nami’s battle plan now… get in a threesome with Sora and Kana.
That which has been seen, cannot be unseen…
That which has been seen, cannot be unseen…
That which has been seen, cannot be unseen…
That which has been seen, cannot be unseen…
That which has been seen, cannot be unseen…
That which has been seen, cannot be unseen…
That which has been seen, cannot be unseen…
That which has been seen, cannot be unseen…
That which has been seen, cannot be unseen…
The future release from BOOTUP, Futa-Ane, has twins. But they are from the diffent kind.
And there’s this future release from CANDYSOFT, MOTTO-ANE. They have twins with reverse-heterochromia.
I play “Castle Age” on Facebook.
Elf Twin Sisters- 
Lilith and Riku
I read Elfen Lied creator’s new manga- NONONONO. It was really interesting.
Nonomiya Yuuta, a Skii Jumper aiming for Olympic Gold, bursts onto stage with his exceptional skills. However, his biggest problem is that he is not really a “HE”… This Yuuta is actually Nonomiya Yuuta’s twin sister, Nonomiya Nono… And with Women’s Skii Jump not being an Olympic catagory, hiding her true identity is the only way for her to achieve the dreams of her father and brother.
From Manga-Updates.
The whole school people of her twin brother did not know and meet her yet. Except his long time rival kept suspected about Nono because he had Eurotophobia. :oops:
EDIT: I made mistake. >.< His long time rival had allergic to any female. I still wonder if he might have problem with his own mother. <.<
So does that mean she has to flirt with the girls and court little Yuri type relationships in order to keep up her disguise? I mean, what’s the point of a girl dressing up as a guy if you don’t get some yuri out of it?
Look what’s got a fanlation patch in the works 
:
Ooh, vera nice … you shall have to keep us up to date on this one.
<8E6009>¬Ö¬Ö??¬Ö¬Ö???¬Ö¬Ö\=…Akira!!..You’re clothes!..
There’s kinda twincest in Kikokugai
Lol.
Yeah the twin brothers… hu ? Oh yeah… and also the Ruili x loli Ruilimaybe
There are twins in the manga Haru to Natsu. One of them is a yandere.
Woot, this is awesome!
If it ever gets finished, I hope the fan disk gets done as well at some point. It was kind of weird playing an ero-game from the girl’s point of view, but it did make some things easier to understand. Well, I say “play”, but I don’t think there were actually any decision points or anything in the fan-disk scenarios. Was still nice to see the class chairman have her dream come true though.
It seems this eroge has twins, too: Tsubasa wo Kudasai.
http://www.getchu.com/soft.phtml?id=667594
http://www.erogeshop.com/product_info.p … id/1013960
DualTail has an angel corruption eroge, that sorta features twincest and triplecest.
You see, as you corrupt your angel, there comes a point when all her good and all her bad divide into two living halves. then the evil half proceeds to rape her good half… but you rape both of them. It’s only for a single scene, since she merges back.
One angel happens to have a good, evil, and her normal persona… hence the triplet factor. :o
Someone translated the Yandere drama CD featuring Nana and Nono, cause I was waaaaaay too lazy to do it.
http://www.youtube.com/watch?v=Lc8_UwvLhx4
See? Twincest will always overcome all obstacles. :o
I didn’t realize who were twin sisters.
http://img59.imageshack.us/img59/7320/seikon11.jpg
It said too big for pixels.
Third rate eroge called KOI-LABO has hidden twincest in it.
However I don’t recommend getting it, unless you’re a twincest nut like me. Only good thing about the ero, is that it supports widescreen monitors: which obviously for twincest, can be helpful. 
Hey, Narg. Did you already checked the new KISS x SIS TV Series?
Unfortunately it seems the producers turned aborderline erotic twincest series into a generic harem series filled with a lot of hentai characters. :lol: