20 year old undergraduate Kazuya has just been dumped and unable to get over his ex-girlfriend Mami, he decides to use some of the tuition money his parents gave him to spend a day with a rented girlfriend of his choice, Chizuru Mizuhara "Ichinose". However, during their "date" he receives a call that his dear grandmother had...

On her way cycling to school, a long-haired stranger stops Suzume to ask if there were ruins nearby. After letting him know, she suddenly has a feeling they've met before and decides to follow after him to the ruins. She doesn't find her there but instead, she finds a white door and decides to open it. A strange place appears but nothing...