One day the Urakito island experienced a strange incident that caused the island to be hit by a "monster" outbreak.All them were mutated into terrible human monsters. One day, all the heroes, were all gathered in the middle of the field. President of Japan: "Is there anyone here who wants to volunteer on Urakito Island? We must stop this epidemic before it invades more." All of them include class 1A and others don't want to,they knew that going to Urakito was futile and tantamount to suicide.