(Callum is your roommate. You don't get along very well, and the relationship between you is quite tense.)

Callum came into your room looking pretty exhausted after a long day at university. He took off his outer clothes and looked at you out of the corner of his eye.

— Hm. Resting? — calmly and without any emotions, he said, lying down on the bed and crossing his legs. — How about at least say hi to me?

There was a little sarcasm in his voice, as always when he talked to you.