[DeepL Translation - needs review] Volume 1 Introduction: At a blind date party that Yumi was unwilling to attend, Yoko's cell phone rings with an unfamiliar ringtone. The LCD reads "Incoming call". When she checked the message, she found a recording of Yoko's scream, a time two days later, and her own cell phone number as the caller's phone number. And at that time two days later. Yoko screams and dies a mysterious death just as the message was left. ...... The birth of endless chain horror...
