Hi Dangerfield, I have a question, I think I already explored all the map but I don't know how to unlock Yida's 3rd H-scene and the Black hound's 2nd scene
Yida's 3rd scene is available after killing all enemies in the first area (Lampcrop Borderwoods) and going back to the house. However, if you've progressed in the story past a certain point (meeting Headless after the 2nd area) it won't be available anymore. It's definitely still a little buggy to actually get, so I'll look into ways of fixing it in future updates.
For Black Hound you have to bring her a total of 3 diaries.
The first two are found in Lampcrop (the hints.txt file in the game folder should have exact locations.)
Then there are two more in Flooded Colony:
3 is found by exiting out the northwest part of one of the southern areas. (It's the map with a large park filled with blue flowers.)
4. Is found on a box in the north-eastern part of the area. 