Sorry if this is necro'ing, but here's an almost 100% save for v1.03 (not the free one I see mentioned above). I didn't pick up every item.
There's actually a Scene viewer (a 3rd option in the menu), but I don't think it's tied to the save file. This unlocks once you "Face your death" when you sleep in your bed. CGs are in Graphics/Titles.
Since I don't think the viewer unlocks everything by the save, here's how to unlock the scenes:
Waifu scenes unlock by marriage.
Hot spring scenes unlock by sitting in a hot spring alone; that is no one else is in your party (except the Abandoned Estate).
Save11 is for those who don't want to navigate the Abandoned Estate to find the hot spring. If you want to, first invite Tsubaki. Now in the estate's center room, activate the hidden door opposite of the entrance +1 square to the right. Before you go down the stairs, activate the hidden door on the top right.
Also, you can change your name with the mirror in your room.
If anyone is having problems finding the the second hidden npc, you'll need to take the fox girl to the sinking hole, and you will find some hidden doors with her ability.
Edit: You need 5 Drops of Life to wake her, I never found them so I hacked them in, so if anyone knows where to find them please share.
Found the drops of life in the Sinking Hole area. I think need the fox girl (Kuchinashi), and just run around the place. I don't think it's random but it's hard to describe. I didn't find any from the swamp entrance, but I also didn't check.