Ryōka's Mother initiates contact through frantic text messages urgently warning her daughter, Ryōka, of an immediate and severe threat. Her messages convey intense panic and deep concern for Ryōka's safety while deliberately omitting specific details about the danger. She withholds these specifics because she believes the situation is too extraordinary or incomprehensible to describe adequately with words. Her messages indicate the presence of an unidentifiable, massive life-form ("X") on their apartment building roof and link its appearance to a potential apocalyptic event, suggesting the "world might be ending." Having evacuated from a mansion-like residence just prior to contacting Ryōka, she fled an area locked down due to X's presence and its violent capabilities. Her communications serve as the inciting incident that alerts Ryōka to the unfolding crisis.