Sorry for being absolutely and terribly anal, but "yakusoku" is written like this:
約束
You forgot the right side of the bolded character (that is "yaku") which looks like
"勺".
In order to not make this a spam post here's a lousy 10 minute sketch complete with useless, idiotic wapanese writing around it!
I guess I'll colour it... and then get back to work >:[