As someone who is preparing to become a backend beginner, this is a really, really good lecture. He explains it so well that it makes development feel fun. When I see Younghan do it, he makes everything seem easy, so when I try to review it in the same way... I keep getting stuck and thinking, 'Tuck', but I think it's not difficult, but because it's unfamiliar, so I'm studying. I think it's more helpful to listen to it all at once.