/jp/ - Otaku Culture

Assuming that she can control her wing's movements, it's probably something like this.
Sorry for my bad drawing.
Now that I've finished, I see that it's very bad... I will make a description too.
So, her shirt is like any other, except that it has buttons in the front and two holes in the back for the wings.
So, the buttons are untied and from behind, she erects her wings to fit them through the shirt's holes. Think of it a little as a pencil entering a pencil sharpener. Once she pulled it until the point that the shirt is touching her back, she just puts it like anyone else.
I hope that helped.