When Rob starts dating a new guy, Dr. Matt, his jealous professor, begins punishing him unfairly by blaming his slipping grades on his personal life. Matt is secretly jealous that Rob is seeking a new dick for his asshole, and can’t really tolerate the idea of someone else being his dominant daddy, so he decides to treat the boy like garbage in his classes and cut off his funding for research. The student fights back but will get a more severe punishment this time: a mouth full of cock. Disguised as a “new side job” to get some extra money for his investigations, Doctor Matt gets full access to his favorite student’s tight hole once again, fucking him whenever he wants. Rob doesn’t have much of a choice now, but the truth is he secretly misses his favorite professor’s dick, so he won’t protest too much if gets a new excuse to eat up his meaty cock and have it deep inside his butthole once more.