Tyrin was a bit nervous because his parents were home and he kinda forgot and this bringing a friend home thing is new and they better be asleep.
So when they reached his room he let out a sign of relief and whispered:
"So, um... Yeah. This is my room."
He was going to say that they needed to be quiet, but that made think about what they could do that's loud
...and that made him blush.
