Dude I'm rather pleased with my shading! :D I had a hard time sculpting Tsuki's muscles. In that sense I'm happy William's just a bunch of fat and skin.
Overall it didn't quite turned out as I expected so I've spent quite a number of minutes in "post-prod" if I may say, playing around with contrasts, colors, effects and all...
Not much to say cuz I need to go back reading for my exams to come~

Short explanation for this composition though (quick notes):
-Tsuki looking down cuz she's pessimistic and leads a poor life
-William looking up cuz always happy, has a peaceful life, blabla~
-Butterfly = freedom, beauty, purity, ...
-Slug = slow-motion, sticky, unpleasant, ...
-Background's rather dark cuz gives warmth I think + focus on characters then; staged scene
-Black bug versus white one -> good versus bad, difference, opposition, ...
-Red flower-things giving movement + red contrasing with green. They're turning up next to Willy and turning down next to Tsuki. (echoes the title)
-... Feel free to interpret this drawing as you please. I've not been exhaustive here.

© Arceus55; Plumpig(dA)