While working on obtain her Master's degree, Nigerian graduate student Monica Osagie faced a supremely disturbing encounter with her professor when she approached him to discuss a low grade she received. 

To obtain proof of the professor's transgressions, Osagie recorded one of their conversations in which he agreed to improve her grades on one condition: she had to have sex with him "five times." 

CNN reports the audio was leaked online, but Osagie says she was not the one who leaked it. However, she did send it to university authorities, privately. An Obafemi Awolowo University (OAU) spokesman confirmed the male voice is that of Richard Akindele, an accounting professor.

"Professor Richard I. Akindele, of the department of management and accounting, is now established to be the lecturer in the controversial "marks for sex" audio recording. The female voice has also been identified as that of Miss Monica Osetobe Osagie, a postgraduate student on the Master of Business Administration Regular programme," read a statement from the university. 

Warning: May contain graphic and triggering content.

"Is it not five we agreed? Our agreement is five," the professor can be heard saying.

"Is it B that you want to give me or A? Why would it be five times you will knack me? Prof, you know what? Let me fail it. I can't do it five times," Osagie responds in the recording.

Osagie told CNN she considered the professor her mentor, and previously assisted him in editing his book.

"We actually edited the book together … then, the next thing he told me was, 'Can you date me?' I was like, 'No.' He was like, 'Why?' I said, 'One, I don't date lecturers, and secondly, you are more matured than I am,'" she stated.

Osagie believes the professor — whose exact age has not been confirmed — deliberately gave her low grades in order to manipulate her into sleeping with him.

Since speaking out, Osagie has experienced backlash on social media and on campus. 

"A guy came up to me at the bank and said, 'Is this not the girl who harassed a lecturer?' and he called me a prostitute. The security guard then had to push me away to go withdraw my money inside the bank," she said.

Still Osagie presses on, and hopes to both raise awareness and inspire other young women to reject sexual harassment from men in positions of power. Osagie's lawyer, Abiola Akiyode-Afolabi, said more students have come forward accusing Akindele of similar acts ever since Osagie decided to speak out. 

OAU authorities have launched an investigation, and Akindele has been suspended pending the results. "I have nothing to say until the university has concluded their investigation," said Akindele, who declined to comment to CNN.