Sex with the principal

I went to the school .I was missing jhon cock. And his cum. When I reached the class my principal came to my class he was a man in his 30s and I am sure he was a BBC. He saw me at the class and then talked to my teacher about something at private and he went. After the school my teacher stopped me at the class and made me wait till after all the students disperse. I was confused but I didn't spoke anything. Then the principal entered my class. He made me sit and offered me that if I do sex with him he will give me good grades and full scholarship.