We Were There follows the 10 year romance between Motoharu Yano & Nanami Takahashi. During their high school days, Motoharu Yano was the most popular boy in school, but can't get over the death of his girlfriend from a car crash. Nanami Takahashi falls in love with Motoharu Yano and must deal with his inability to let go of the past.

During the 2nd year of high school in the winter season, Yano transferred from Kushiro to Tokyo due to a family matter. Yano and Nanami promised to meet again. A couple of years later, Nanami is busy finding a job, while Yano's friend Takeuchi supports her. in the beginning, Yano and Nanami kept their relationship, even with the long distance between them, but Yano suddenly stops contacting Nanami.