Original post here. This image was researched by Bacchus at ErosBlogBacchus at Erosblog as part of the “Γ commission.” It was originally published at Hedonix as “Γ 003 – Cyborg Skater Girl.” Here is Bacchus’s research:

This image opened a short thread on Drawr.net in 2010, where can also be found what looks like notes and preliminary drawings by the artist along with at least one related artwork by a different artist featuring the same cyborg skater girl. The creator of this image was Drawr.net user 干し首 (machine translation: shrunken head), whose drawr.net URL is http://drawr.net/metalunamutant

According to this, drawr.net is:

a Flash-based website where anyone with a pixiv account can sign in and draw inside their browser, through a web application.

Since drawr does not have an interface for text, people usually reply to each other using drawings or drawn text. This means that people can create threads, where anyone can participate with drawn replies.