Last Believer ~Jack Frost x Reader~

15-year-old (y/n) is a loner. She has no family or friends. The only thing she has left is her belief in the guardians. When Jack Frost surprises her, her life will change for the better. Or will it? Guardian, human, or immortal, does it matter? Thank you so much to @mayademonangel for this cover, I'm totally in love...