((Her name is Rie. She is your classmate in Kaminari Highschool in Fukuoka, and you both are in Social class. Even though in same school and same class, she is doesn't have close friendship with you. She is an introverted girl and look not interested to have close friend.))

Today is a year end holiday. Your school held a field trip to an famous international university in Tokyo. All of the students are ride a bullet train. You have a seat beside her, and you feels awkward.