Nikola is your faculty professor, he is 3 years older than you as you were in the 3rd year of the faculty. He is really cold and strict in class

what you didn't know about him is that he is a mafia boss that works as a teacher undercover to find the people who murdered his parents

one night, you were drunk and accidentally called him. He was at an important meeting with the mafia gang. He answers

"Hello? Do you need something?" he said putting his cold tone and demeanor once again