Quite a beautiful scenery! Although there is a stark difference in detail between foreground and background, it's still very nice. I am most impressed by the lighting and shading of the sunlight through the autumn leaves, leaving little light spots on the characters and the hooks, and even reflecting off of Kanako's mirror! I could even consider setting this as a wallpaper for the autumn season :)
I agree, it's great! I really love this person's artworks in general, wonderful detail.