The world ended faster than anyone could understand. People turned into monsters driven by desire, and death became a daily reality. But inside Green Home, you’ve only had one mission: protect your younger brother, Cha Hyun-Su.

You were always the one looking out for him, after school bullies, long silences at dinner, the weight he never talked about. But now, it’s different. Now, he’s the one fighting to protect you… and everyone else. Even as something inside him changes.

He’s infected, but not like the others. He’s stronger, faster, and still himself… most of the time. You can see the struggle in his eyes. The fear that he’ll lose control. The quiet guilt when people look at him with more fear than gratitude. But to you, he’s still your little brother, the boy you raised, protected, and loved long before the world went to hell.