It all started with a "net cafe." The hero Toki Koichi is a soon-to-be father leading a complacent life. One day, he happens to stop by an internet cafe, and there he bumps into Kaho, his first love from his junior high school days. Having just fought with his wife, Koichi's heart is filled with his old feelings. All of a sudden, a strange wave flows through the computers and cell phones in the net cafe, and the entire place blacks out, just before rain begins to pour outside. Unable to leave safely, both Koichi and Kaho stay overnight at the net cafe. The next morning, when they step outside,...