TLDR: Here is a "Full Save". Unpack the files into your own Save folder and replace as necessary. For safety though, make sure your own saves are backed up.
Getting tired of people asking, so I have decided to give the people what they want (to the best of my ability). Forewarning, this was obtained using my decompiled version of the game. All chaos route characters were not obtained ligitimately, as I have not actually cleared the third route. But it does have every character in the game unlocked and in the pocket castle. A by-product of this process though, is that its broken the party management screen, crashing the game if you try to change your party members. So if you want a specific character, you'll need to find them in the castle manually. I consider this a fine compromise, regardless, since the people who want a "Full Save" for this, I assume, are only interested in the scenes (for whatever reason).
I was considering giving everyone enough affection to already have the scenes unlocked, but since I find the idea of a Full Save for this narratively driven game to be rather comical, I've opted to not spend my own time on it. The file has plenty of gifts, ya'll can handle that on your own.