quick fix of slightly dusty scan, nothing serious here. 90 jpeg with subsampling, so a lot of artifacts. Kaoruko's hair is supposed to be navy blue and not light violet to deep violet on top. some colour banding near crease removed.
exported to 96 jpeg to reduce size, as png would be ~13MB. that what you get when you edit large and noisy jpegs.
from now on i will embed gimp's icc so +672 bytes to image size. i apologise for not adding them from the beggining. i hope it will improve your image viewing from browser.
report if you've found some unfixed parts.