I am a hero. Integral, 2

A strange and chilling epidemic is spreading like wildfire across the Japanese archipelago, and perhaps the entire world. Hideo ventures deep into the wilderness, hoping that by distancing himself from all human contact, he can also escape the virus. But there he meets Hiromi, a teenager on a school trip who is unaware that the world has entered a terrible spiral of destruction. Can this unlikely pair join forces to save lives?