Keiichi experiences a peculiar dream in which his childhood sweetheart transforms into a captivating stranger whose presence lingers after he wakes. The following afternoon, he returns home to find the same woman waiting in his room, prompting his mother to introduce her as Reika, a newcomer to the household after a family tragedy. As introductions unfold, Keiichi senses an unsettling connection between the visitor and his nighttime vision, hinting at hidden motives behind her arrival.