"Conceal. Don't feel. Don't let them know." 

Those where the words that a 19 year-old-girl would tell herself.
Her name was Jieun, she wasn't like any other girls. She wasn't normal.
She had the powers to make ice or snow from her bare hands.

"Please don't shut me out again. Please don't slam the door."

Pleads from a young girl who was once close to her sister.
Her name was Suzy, unlike Jieun she was completely normal. 
Living a boring life in a castle eversince the doors have been locked shut.