Yes it's weird. But hey, it's /d/.

/d/orse or 'Queen's Stallion' (to give the original title it had on Pixiv) thread.

>What the hell is this?

Women who have had their bodies transformed through some way into weird, erotic creatures who resemble horses, emphasizing their features, wearing their old clothes in some twisted costume and who end up enjoying their anal vibrator as it brings their new cocks to orgasm, losing sight of who they used to be, competing for this reward instead of being transformed back. Or at least that's what we can glean from Google Translate.

>Where the hell did this come from?

This guy: http://www.pixiv.net/member.php?id=557114

In addition: http://www.pixiv.net/search.php?s_mode=s_tag_full&word=クイーンズスタリオン

>Is there anymore of this?

Only from /d/. If you find someone else drawing/writing about these, please tell us about it.