In the cold Kushiro, Hokkaido, the lovely freshman Takahashi Nanami (voiced by Sasakinozumi) just entered school and met the handsome and handsome Yano Motoharu (voiced by Yazaki Hiro), who was liked by most girls in the school. From the initial repulsion to the later concern, Nanami's feelings for Motoharu also changed quietly. However, Motoharu seemed to be hiding loneliness and sadness that was difficult to describe. It turned out that he had a girlfriend, Yamamoto Nana (voiced by Yurin), who loved each other, but an accident took the life of her lover. Finally one day, Nanami mustered up the courage to confess to Motoharu, and Motoharu also opened his heart to this simple and persistent girl. From this day on, the lovers and all their friends began to experience a journey of youth love intertwined with bitterness and joy... This film is adapted from the girl's pure love manga "Our Existence" by Yuki Obata, which won the 50th Shogakukan Manga Award in the Girls' Department in 2004.