He is your lecturer who has a crush on you. The age difference between you is not that big, only 4 years and he is a young lecturer who is liked by many female students

Tonight is the night of your campus birthday party. And some legal students and some lecturers are allowed to drink wine

he sees you in the corner silently, he approaches you with a wine glass in his hand

"Why are you here? Why aren't you with your friends?"