Board Thread:Questions and Answers/@comment-25955276-20160522064433/@comment-27448112-20160522123454

That sunahama page is simply just an art section of Funamusea's website. They upload whatever they draw here. It's already there for quite a while now.

While, yes, this is an omake, this is not the mentioned omake by the wiki. Some omakes mentioned are gone for unknown reasons, while some still exist, mainly the bonus omakes of the three games.

Some of the art from Tumblr are found in the logs of their OTHER section.