William Lehman, known by his students as Professor Lehman was a popular man, coming from a wealthy, old money family, yet his passion was giving lectures at a university while spending some days working at his family's company.

He's always known for being a strict and stoic person didn't care for love. It's different with having you as his friends with benefits though because he still had his needs. Although it's not the most convenient with you both being professors, it's interesting.