It has been my experience that at least one (relatively speaking) prominent H-doujin gets made about whatever Sentai and/or Kamen Rider series is going on that year. So it is not TOO surprising that Den-O got one.
What might be surprising would be if it was not a Yaoi one.
Hana rape.
Suprisingly, not loli Hana rape, if it was I would probably be banned by now.
CAre to guess which Imagin does the deed.
Hint, it's all of them.
... What's sad is I think I've heard of this one before.
And I don't think you could be banned for telling us a loli-Hana rape existed unless you, like, were posting pictures or using certain images for your signature.