Onyx: Transfusion

It's 2020, three years ago Japan's Kyushu island was attacked with a biological weapon that almost infected the entire population of Japan, But China stepped in to give Japan a hand and isolated the entire island before firebombing it. Three years after the incident the man behind the attack is caught, and sentenced to be executed for his actions, but his execution goes wrong and he escapes to see his son, but not for a last chance to make up for his disappearance.