Gallery help

[pegaso650]

In the CG gallery for all the girls i miss the picture #15 (the last), what is it about?

I miss also almost all the pics of the Other gallery (the one you can see pressing Y), I have only the first four ones and the 1st one of the 2nd page. How to get the other ones?


EDIT: to get all the pics in the galleries must play at the 'highest difficulty' level
I still miss the 2nd last pic of the 'Other gallery'