Yu Wan's grandfather went to bed, and his master was far away.
She thought back on her previous sixteen years of life, and had never had contact with a third person.
She was very angry.
I went to bed holding the book left by my grandfather and the sword left by my master.
When I woke up, I entered a different world.
She decided to search the world for her master and grandpa and 'blow' their heads off.
Concept: A tadpole looking for its mother