Kōgen ni ressha ga hashitta

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.