"Brother", she called desperately. Seeing her older brother leaving her behind on a snowy day. She wasn't even old enough to understand what that meant. He turned around hesitatingly for the last time and told her: " I'll bring something to eat. Wait here!" Though Yana trusted her brother, she did sense the deep feelings of her brother behind the smile he showed her for the last time. The charming smile that she would not be able to forget, even after losing all of her memories.
Five years later.
Yana is now a high school student in the prime of her youth. She has been able to live a normal life for a teenager. However she does not have any remaining memories of before she was eleven years old. Not even remembering that incident.
Yana, what's up with the dark circles under your eyes? "You're one to talk. What's up with your hair today, Keito?", Yana asked while snickering. He got annoyed which is really easy to see since Keito is someone who cannot hide his feelings. He is one of the most simple-minded people you would be able to find here, in Japan. The total opposite of Yana.