Original post here. This image was researched by Bacchus at ErosBlog as part of the “Δ commission.” The research was originally published at Infernal Wonders as “Δ 010 – Nāga Woman.” Here is what Bacchus found.

This image of a female Nāga has proved difficult to source. Two different reverse search engines attribute it to a particular artist on Pixiv (see this link at SauceNao and this link at ascii2d.net) but the associated Pixiv links for the image (Pixiv illust_id 19829481) and possibly for the artist, said to be named あなろぐ＠ステータス異常好き。, Pixiv member ID 2088369) do not work. (They lead to an unrelated image and an artist whose work does not appear particularly similar to this naga image, although the Japanese name matches the one given at SauceNao; nor does the Pixiv portfolio contain the Nāga image.) The reason for the non-working Pixiv links may be a recent incompletely-described and poorly-understood (at least by me) recent change in Pixiv’s link structure.

Unfortunately, no other/better attribution for this image could be discovered.

Both of the reverse image searches linked above also point to a related image with Japanese text superimposed over the lower half of the image, but only the thumbnail of the related image can now be found. It is included here at 300% zoom, about as large as the underlying image information can reasonably support: