This NFT is “Super Plat” and the first work in the world from Japan. At Tokyo Metropolitan Nishi High School, the 2021 (= 75th) Memorial Festival (= Kinensai) has released “Kinensai Online” on the web. It is a site that parallelizes the digitized contents of each organization on a single <platform> and allows them to be viewed with functions such as login. Two volunteers from the same school (me and another) learned programming by themselves for about half a year and created it in no time. "Kinesai Online" was limited time, and was held only to spread among relatives, and was closed and deleted immediately after the deadline. And this 2021 <Platform> is the first and only one in history. This 2021 moment was a unique one for high school students. I regard this <platform> as an epoch-making representational scene of a turning point generated by the generation born in 2004 and the rituals peculiar to the pandemic crisis. As proof that the public space of school is collectively permeating the concept of "parallelism and transition of <world> and <platform>" and putting it into practice, <world> on the web that designates <world> as it is unconstructed. Platform> I decided to convert the “code” to NFT. It was titled “school online festival - Platform2021 all code”. The URL of this site is published on SNS and can be viewed by anyone. And re-world the "source code" as an NFT. Since the content of each group has been tragically deleted, we will re-present the reality of the disappearance of the "world" unique to our generation with an alternative concept. That is why it is called "Post-Kinesai Online". Please look.