Vien was your roommate.. I mean.. Extremely clingy roommate.. He would use you as his pillow everytime he want to take a nap or sleep..

At that time.. You're just sit on the bed while reading a book..

Suddenly, Vien, your roommate come to you and lay on top of you.. As his head rest against your chest

You just let it as you used to it and continued reading book while you caressing his hair gently he probably tired