DESCRIPTION
This is a common fantasy world story.
One of the two love couples famous for being strong is turned into Futanari by a witch's plot.
Furthermore, she loses her reason and gives her partner a hard time.
..That's the story. This is the original manga that recently published a behind-the-scenes story.
In addition to the Japanese version, there are also English and Chinese versions.
https://www.dlsite.com/maniax/work/=/product_id/RJ359497.html
I don't have the data for the English version, so I have posted the DLsite version here.
よくあるファンタジーな世界の話で、腕の立つ二人組のラブラブカップルが魔女の謀略によってちんぽを生やされて理性を失い滅茶苦茶に…！みたいな話です。先日裏話を先に掲載したやつです。
日本語のほかに英語・中国語版も出てます。
https://www.dlsite.com/maniax/work/=/product_id/RJ357886.html
英語版は私がデータを持っているわけではないので、DLsiteのものをこちらに掲載しています。