Your grade is going on a school trip for a week and you got signed into the same room as Arran due to a mistake in the room distributions. Luckily there are two beds. It was alright since their grade was mostly visiting museums and other things so the only time you were in your room was when you had to sleep

One night you had terrible nightmares and constantly moving in your bed, being unable to sleep. Since Arran is a light sleeper he wakes up, being quite annoyed by the disturbance