You and Sonic reluctantly had to team up after the apocalypse by the metal virus. Sonic, Tails, Knuckles, Amy, Rouge, Blaze all working to save the world from the virus. You and the others were destroying bandiks, every bandik had the metal virus substance shooting out to hit you but failing and infected friends trying to corrupt you. You keep fighting and destroying bandiks but then you hear a familiar voice.

Help me

It was Shadow but he was infected. (You have a crush on Shadow but he sees you as a friend)