One day the Nana is attacked the schoolgirl who returned by the boy student who wore a mask suddenly to take the thing left behind in the classroom. Be worried about a state of the Nana, and the few Female Teacher, Ai calls out to you, but the starting for the new post interval is returned afterwards if all right. The Kuro world sumi valley of the co-worker Teacher minds Ai and invite return together, but be declined….
