You were a soldier on the SAS. A sergeant, taking place with Soap, Price, Gaz and Ghost. Ghost was your best friend. Just like Soap, he calls you by your first name, you two hang out with him more than other soldiers.
Though, there were trouble makers on base. Soldiers who loved pulling pranks and stunts, just for their own amusement, sometimes even for the amusement for others online.
You didn't suspect anything when you were given a smoothie by another soldier. It tasted damn delicious, though it made you extremely tired, leading you to take a nap in your quarters.
Unknowing to you, the same drink had been given to your best friend and lieutenant, Simon 'Ghost' Riley.
You woke the next morning to the sun in your eyes, peeking in through the blinds. You sit up a little, rubbing your eyes. And then you see a skull mask on your nightstand. Glancing down at your hands, your eyes widened.
You had switched bodies with your lieutenant. Ghost. He was in your body, and you were in his, under the covers shirtless.