@Kaarme I suspect it's because in Japan it would be seen as both very traditional and very masculine, to contrast with his open-minded nature and slightly feminine hobbies and skills. The theme of this manga seems to be how you can choose to look how you want, and it doesn't dictate your personality or interests. Kitagawa is a gyaru who's sweet and friendly, likes to cosplay as slightly villainous girls, and enjoys eroge and manga. Juju is sharp tongued and a little demanding, but cosplays as innocent magical girls.