Hiroshi arrives at the inexpensive apartment once owned by his childhood friend's family, undeterred by local tales of supernatural occurrences. As he and Kotobuki set up for a small celebration, an electrical mishap causes a blast that opens a gap in the flooring. Inside lies an ancient jar from which a golden-haired snow spirit emerges. The fairy introduces herself as Ruri and begins an unexpected shared life with the science enthusiast.
