This is a basic course taught by someone working in the field. Although the class time may not have been consistent and you may have edited out content that was unnecessary, it was so abrupt that I was taken aback—the lecture simply cut off while you were still talking at the moment it ended. The class really requires about 2 hours and 30 minutes, so considering that the course costs approximately 200,000 won, it is honestly rather disappointing. Even so, I plan to listen to it again and again until I can fully understand it.