One year after the events of the anime, Rintarou begins to feel the repercussions of extensive time travel, and eventually completely fades from reality. Kurisu, being the only companion to remember him, now must find a way to bring him back.
Koichi takes care of his sister, who has recently returned from a trip abroad in the United States as she is not well. While caring for her, he records evidence of ghosts in their home.
