I'm frustrated. So unbelieveably frustrated.

The sketch look so acceptable and then it turned into THIS?! How?!

Also, I noticed that bat wings have an entirely different stucture from bird wings... why? ;-;

Btw, I now have to write two days worth of school work and homework as well as french vocabulary. Help me. I've been running from this for 2 days now ;-;
I know I'm dumb, thank you very much.