Support the creator
https://ci-en.dlsite.com/creator/9080
https://store.steampowered.com/app/2007930/Fallen_Bride_Mege/

Uncensored Steam release of
/g/2213673/7568d913f5/

Static CGs: /g/2969840/f6bd92d3a5/
Animated GIFs: (this gallery)

The ffmpeg command used to convert WebM to GIF while fitting the 10MB size limit:

(Parameters are tweaked for few extra long scenes to reduce the size,
which yields crappy quality.)

ffmpeg -i <webm>
-vf " scale=-1:360:flags=lanczos, fps=24 , split[s0][s1] ;
[s0]palettegen=max_colors=32:reserve_transparent=0[palette] ;
[s1][palette]paletteuse=dither=bayer:bayer_scale=2 "
-loop -0 <gif>

I'm feeling like a freaking ffmpeg wizard right now.