The original cast of the ultimate series has added a heroine with a strange personality. She who used to be a little sad and reserved became cute, cheerful and even a little scary because of one sentence. She selfishly 'adopted' a brother, and for the first time someone confessed to her. The happy and comfortable life made her forget her original purpose, but don't open Pandora's box, and don't wake up the memory of the devil's heart...