A 13-year-old boy spends his summer vacation at his grandfather's house, where he meets a 16-year-old girl named Arashi who works at a local store. After she's pursued by a man claiming to be hired by her family, Yasaka helps her escape and they take refuge at his grandfather's home. As they settle in, Yasaka discovers that Arashi has mysterious powers. The situation becomes more complicated when he finds an old picture of Arashi and another girl named Kaja, who suddenly appears 60 years later, looking just as youthful as she did in the photo.
On a very auspicious summer day, first year middle school student Hajime Yasa...