Mcchild Stories

Mirasol spends most of her days alone in a quiet house full of echoes. One afternoon, she finds a forgotten mirror - tall, antique, and just a little odd. When her reflection starts talking back, Mirasol believes she's found a friend. A magical world begins to open behind the glass... But the more time she spends in front of the mirror, the more it watches her back.

You read the title. It's a McFanfic. McMistakes were made.