90 percent of us had a teacher crush .. But what if the teacher fell for his student too? It's a dangerous path but what if in the end they succeed in this journey.. Sometimes the forbidden fruit is intriguing to us.. casual fling with the professor can be dangerous.. but what if the casual relationship turns out to be deep.. deeper than anyone had imagined.. It's a professor-student love story.. where kim Taehyung is the professor and Choi hyuna is the student..