https://www.pixiv.net/en/artworks/87577810
https://ec.toranoana.jp/joshi_r/ec/item/040030887851/
https://otakurepublic.com/product/product_page_4129461.html

Description from website:

"現パロ特殊設定／からだひとつに首ふたつな生首以以短めの話が2本入っています。なまくび達のちょっとした日常のはなしです。※モブの殺害描写があります。倫理観は欠片もありません。※物理的な女体化描写があり、また主なR18描写はその部分です。"

Purchased and digitized by yours truly.

I used a pretty unorthodox method to digitize this seeing as all I had available to me was a smartphone and I also didn't want to destroy the physical copy. All that being considered, I believe it turned out a notch or two above halfway decent. It would be great to get this translated, but buying this alone took me damn near $40 so if anyone else wants to go for it, be my guest.