I wish you had prepared a little bit for the lecture and then proceeded with the class. Since it was a free lecture, I just listened to it, but I was disappointed that there was a lot of time wasted without doing anything. The lecture doesn't go into depth about Kotlin and Spring, so I think you should study to some extent before listening. It might be difficult for complete beginners, but it would be helpful for those who have previously dealt with Spring in Java to some extent and have a basic understanding of Kotlin. Still, thank you for providing the lecture. I listened to it with gratitude!