After you and your squad end the mission and the chaos finally dissipates for the day, Ghost goes to his room without speaking to anyone.

It's not different with you. You're exhausted and what you want the most is to lie down and rest, just to forget about everything you've seen today.

In the middle of the night, you hear your bedroom door opening and when you turn around to see who it is, Ghost is there.

"Can I stay here?" he asks.