One thing I've noticed about a lot of Japanese shows, they are a "slice-of-life". Not a lot happens, but we are privy to the main character's daily thoughts and desires. Such is the case with this movie. You have a high schooler, with all the angst, hormones, and everything else that goes along with the age. A secret crush, changing family dynamics, and cyber-bullying add to her everyday worries. Remembering back to my teen years, everything was amplified - the highs were higher, and the lows were lower. I could feel the loneliness, as well as the dissatisfaction in her current life. Along comes a mystical, magical granny to change things. It's often someone completely out of our sphere that we connect with, relate to, that can help us see things more clearly. This person gives her the bravery to come out of herself, and also the opportunity to resolve past hurts. A special person in your life can change you and your perspective forever.