Original post here. This image was researched by Bacchus at ErosBlog as part of the “Γ commission.” The research was originally published at Hedonix as “Γ 019 – Remilia’s Metal Wings.” Here is what Bacchus found.

This artwork is titled レミリア (machine-translates to “Remilia) by うどんやきりい (machine-translates to “The Kirii and Udon”) on Pixiv. Among the machine-translated tags we find “Remilia Scarlet”, who (according to this wiki entry) is a vampire character in several video games in the Touhou Project, which in turn is “the world’s most prolific fan-made shooter series.” Remilia has the power to shapeshift into a bat, but “her wings remain visible even when she is in human form, making it impossible to pass herself off completely as a human.” It is unclear whether the cyborg-style wings in this artwork are canonical in appearance, or are the artist’s whimsical reinterpretation of the character. There are nine pages on Pixiv of other artworks with the same Remilia Scarlet tag, with a great diversity of depictions.