After exiting the station, Zerozaki Hajime first headed to the public restroom.
She restored her adult form and changed into regular clothing.
There was no particular reason other than the fact that her adult form was more comfortable, and channeling energy was much smoother in this state. Nowadays, Zerozaki Hajime knew quite a few tennis players, and if it weren't for the fear of energy depletion, she really wouldn't bother maintaining her teenage girl form.
Chapter 31