Well, I decided to change the initial name of this topic - guess it's better than creating new topics every time you get stuck >_>
There were several other old savestates sharing the folder with Demon City's save.
Two of the most annoying are:
Rakudai Tenshi Coron. Completely stuck between several locations while searching for one girl. There's a hint on this screen but can't translate it properly.
Koukan Nikki 1. Personally I hate this type of pixelhunting because it's much easier to make the girl come in real life than here. After 5 or 6 clicks I keep getting this annoying message and nothing more