Early 1998. After being transferred to Class 3 of the third grade at the northern Yamiyama Middle School, 15-year-old Sakakibara Kouichi feels uneasy. The tense mood that permeates this class is the cause.
He is drawn to the attractive but enigmatic Misaki Mei and wants to get closer to her, but this just deepens the mystery. The following catastrophe was already in store for them. What in the world is going on there?