The approximate story is that Lucy embarked on an adventure to save her mother. After the death of her father, her mother's mood has been low, unhappy, and mentally serious. Lucy wants her mother to be happy, but Lucy She was physically disabled, so she could only be kept at home by her mother. Lucy yearned for the outside world. One day, Lucy flew out of the bedroom windowsill by kite. Since then, Lucy embarked on a journey of growth.