This doujin began production two years ago. However, thanks to the constant Comiket postponement as well as the artist's motivation disappearing, it turned out half-finished.
The author apologized to those looking forward to it, since they "drew what they wanted to draw" and this is the end of the story for now.
The author expresses that he wants to approach this Koyanskaya uterine prolapse concept again someday, properly this time.