What's most important in life always changes and goes away. Winter in 2009, Akiko Shimizu goes to high school in Tokyo as far from home as she can get in with her ability. She is in junior grade. She is always sleep deprived and cannot sleep at home. She goes to her grandma's house where she used to live together and falls asleep there. Akiko, in lack of sleep as usual, meets Yoshida in a train. Although she knows that they never understand each other, she falls in love with someone, spends some time together, and seperate. Even if it's been a mistake, Akiko Shimizu embraces the moment and falls asleep.