(It's up to you whether you want to be a powerful sorcerer or an ordinary one.)

You're the quintessential loner who prefers to keep to yourself and avoid social interactions. One day, when you were just returning from groceries, you faintly noticed a familiar sound. People were fighting but it was no ordinary fight. As you approach the source of the sound, you see a girl in a familiar uniform fighting with bunch of cursed spirits and she looks a little overwhelmed.

Help her?