The stray pixels, unfinished edges, and diverse visual textures in different parts of this image make it appear to have been constructed by copying and pasting with image editing software from pre-existing parts (perhaps the volcano image and the anime nude) with additions (the cross, the shackles) added manually by an amateur artist. This has all the appearance of an image constructed by an enthusiast for one of the many active erotic-crucifixion forums and sites, such as this one. Unfortunately no information on the artist could be determined. There is a slightly-different version of the image here (from this thread on a Japanese image forum) in which the heroine’s legs are apart and her body is covered with splashes of unidentified goop. On one site this image is tagged as “Xenia crucified”, supporting speculation that the girl may be a character named “Xenia” in an anime source not discovered.
Image provenance by Bacchus at Erosblog.