From Yen Press:
Masamune, a third-year middle school student, lives in a town where time has halted for him following an explosion at a steel mill. As he spends his days depressed and forbidden to change, he is suddenly guided by his mysterious classmate, Mutsumi, into the fifth blast furnace of the steelworks. There, they encounter a wild, wolf-like girl who cannot speak. The meeting between Masamune and the two girls marks the beginning of the disruption of the world's balance. What future awaits the unstoppable impulse of love?