Forty-Seven Days

Melody. Somewhere around 13-14 years old. Her mother named her that because she liked to sing. Before everything happened. Melody goes on to become a well known girl in her school and isn't that popular but she doesn't care much about popularity. She doesn't have a best friend and mostly keeps to herself. She's an ambivert, but can be on either side when she wants to. Melody's soft hearted sometimes, but also a rascal. She's brave and sometimes fearless. She has friends, but doesn't like to stay too close to them because she's afraid they'll spill all her secrets. Which is why she doesn't tell people about herself.

One uncertain day, she finds her way into a magical realm, separating her from the real world and her world. She then meets a random boy named Dean and is lured on by his trap. Dean seems normal, until he lures her in and locks her up in a cage. He reveals to her that he's actually a witch. (Not that type of witch. I don't believe in witchcraft.) Dean leaves her in the cage for a total of 47 days, not realizing that she was plotting to escape. But instead of really escaping, she gains certain feelings for Dean and ends up making excuses to stay. Overall, Melody secretly becomes more and more obsessed with Dean, hoping he feels the same way.
Dean was actually informed to capture her. Once the 47 days are up, he takes her to one of his friends, who is a more experienced witch. The original plan was to actually end up killing her, but he wasn't trained enough for that.

Even though, the whole question is, why?