In the era of COVID-19, the "Untact" services are developing rapidly. They have brought about many changes in daily life. Among them, teens are living in a virtual reality. It looks like a virtual place. But it is almost the real world. Recently, among the games kids like to play, there are "Minecraft", "Zepetto of Naver" , "Animal Forest of Nintendo", to name a few. What is "Metaverse"? The word "Meta" means transcendency. The word "Verse" refers to the universe. The company that is investing in Metaverse the most is Facebook. In Korea, Naver is doing so heavily. In case of Minecraft, as of 2019, the number of its members is 120 million. It is the most famous game on Youtube. It was acquired by Mocrosoft in 2014. In case of Naver's Zepetto, the number of its members is 200 million as of 2021. The number of the contents that its users created in it is 900 million. (Part1)