Thirteen year old Yasaka Hajime is a boy staying at his grandfather's house during his summer vacation. One day, he meets a sixteen year old girl named Arashi at a café and it is love at first sight - at least for him. He decides to start working part-time there, in order to be close to Arashi. But Arashi is not just a regular girl; she claims to be a ghost possessing him. And if that isn't enough, it turns out that with Hajime's help Arashi can travel to the past. But she's not the only one with a weird past; many other characters working in the café have a particular secret not everyone knows ...