Kanon - the last Nayuki CGI

[Xaviator492]

Howdy.

 

I spent last weekend going through the Kanon game from 2006, and I must say that it is a lot more tear-jerking than the anime, especially the Shiori path (which was almost glossed over on TV).

As the title says, I have played through all 5.5 of the arcs, but there is still one CGI I haven't unlocked. At the end of the Nayuki set there is a blank square and the completion rate is at 98%

 

I couldn't find any info about it, or image-sets, does anyone know how to unlock it?