Mana Kotani (Yukino Kishii), who is shy and timid and can't express herself well, meets the free-spirited and somewhat incredible Sumire Ugi (Minami Hamabe), and the two become good friends. However, Sumire went on a trip alone and disappeared. Five years after Sumire disappeared, Mana still couldn't accept the fact that Sumire was gone. People around her thought Sumire was dead, but Mana strongly resisted this. One day, Mana received a camera that was very important to Sumire from Sumire's ex-boyfriend Tono Atsushi (Haruka Sugino). The camera stored the memories that Mana and Sumire had together, as well as Sumire's secrets that no one knew... In order to meet Sumire again, Mana went to the last place Sumire traveled...