Tbh I couldn't understand this for me the story was kinda complicated but I think I understood this at the end. The art was so beautiful that I just went with it even through my promblematic understanding. 
In the nighttime, I'm the biggest yaoist ,
Just a normal girl with a normal life.
But there's something about me that no one knows yet,
'Cause I have a secret.🤫
Just a normal girl with a normal life.
But there's something about me that no one knows yet,
'Cause I have a secret.🤫