In 1999, a general trading company in Tokyo celebrates because Shinkansen of Japan wins priority negotiating rights for the Taiwan High Speed Rail. Haruka Tada (Haru) has been working at the general trading company for 4 years and she is sent to Taiwan for work. When Haruka Tada was a university student, she visited Taiwan for the first time during the summer. During that time, she happened to meet young Taiwanese man Eric and he showed her Taiwan for a day. She lost contact with him after that and she could not find him again. She then sealed away her thoughts about him in her mind. 6 years later, Haruka Tada arrives in Taiwan again.