Tadamu-Tadase's B'day

okay this picture is Amu suprising Tadase from behind and she said "Suprise! Happy Birthday Tadase-kun!"
Tadase is so suprised "A..Amu-chan"

well sorry for the picture is it bad? i was just trying my best though but i can't make it better than this, so sorry
i even don't know how to color it with photoshop