こいしちゃんの日と聞いてｗ
大急ぎで描いたのでキャンパス大きかったかな～
こいしちゃんも大好きなので間に合ってよかったです！

I hear it's Koishi Day. LOL
I drew this in a big rush, so I guess the canvas was huge.
I love Koishi-chan too, so thank goodness I made it in time! 5-17 = [i]ko (go) - i(chi) - shi(chi)[/i] = Koishi. She actually wrote "campus" instead of "canvas", but based on context, I think it's a typo.