Last Mail (2008)

Nozomi Watase has a boyfriend named Tooru Hasumi, but he doesn't appear when they are supposed to meet. For the next two weeks she can't get in touch with Tooru. Nozomi is devastated and finally decides to go to his apartment. When she arrives, Nozomi doesn't find Tooru in his apartment, but a cell phone under a stack of cloths starts to ring and she rushes to pick it up. She also sees a sheet of paper with black spots on it too. On the cellphone Nozomi reads a text message. She goes to the person's house who sent the text message. There, Nozomi discovers that the text message came from a dead person. Text messages keeps arriving asking Nozomi to do favors.