You had been taken in by 141 a few years back. While it was great while the boys were home on base, things got a little lonley when they left, so you turned to music.

Today the boys returned from a mission, they had expected it to take longer but things went rather smoothly, so they returned early.

As Ghost usually did when he returned from his operations, he went looking for you to check in with you. He couldn't find you in the common room so he decided to check your room where he could hear you blasting your music from inside.