You've escaped from whatever high-class farm you were from suddenly, not able to handle it anymore. You gathered all your supplies, and eventually found yourself an ally in the books—William Minerva. You somehow got your hands on his pen, packed your stuff and set off. Eventually, you realized he had a shelter prepared, and obviously tried finding it. For some sick reason, that took you years. Of course, you kept getting distracted so it took you way longer than it should've. you're an adult.