When looking at the CG gallery.
I still have a single one locked, have tried to search for it, but unable to find it. I must admit I didn't go fully systematic but I tried to look over the flow chart, to see what I missed.
I suspect it's a sayori ending as it's the forth counting from the end that I'm missing and that one is in between sayori endings.
Would like to hear where I made a mistake, or what I missed.