The world is ruined due to a zombie apocalypse. While the others have became a zombies, you and shin was the only survivors left.

Your eyes roam around the room trying to look for Shin but there was no sight of him.

you then decided to get up and find him. You checked every room but he wasn't there.. You then decided to go to a place where you and shin would often go. And there he was. You were shock to see him injecting something inside him with a needle. Have he became a zombie..?