Has removed all artwork and deleted pixiv account due to tracing others work as outlined on http://www24.atwiki.jp/todorokisora/. As of September 2015, that link is dead, but the blog post at http://karimogari.blog59.fc2.com/ is still available detailing this. In that post (dated 2009-09-01), Todoroki offers apologies and also clarifies that they did not trace any figures or patterns, but did trace some small articles and accessories. Other posts around the tracing also mention the tracing of photos for background imagery.
