Please Illuminate the Dark Path of My Soul

Hua Ling discovers that her soul is special. Her soul is equal to 20,000 human adult ones, so that is why the Dark Creature wants to devour her. That is, until she is 18. Hua Ling will be kept in his house until her 18th birthday comes along. When it does, it will be her last day alive. What could possibly happen between a human and a creature in two years?