A family moves into a house, but discover that it is haunted by a murdered girl.

Azusa and Kanami have been best friends since high school. After Kanami dies in an unexpected accident, Azusa despairs yet finds comfort in sending text messages to Kanami’s cellphone. Kanami’s parents wonder about Azusa’s identity, and upon visiting the orphanage that their dead daughter cared about, are moved by her good deeds.

Akiko, a girl living a hard life after her father passes away and her mother's new boyfriend turns abusive, starts receiving encouraging letters from her 30-year-old-future self. Akiko also starts to get bullied in school, and her teacher Shinomiya tries to help her, but ends up losing her job. Akiko also unearths a story written to her by her father, telling her how he originally met her mother, who was the abused daughter of a politician.