Pien song (English version)

The song is originally released in Japanese as "Pien no Uta" and was buzzed among young people in 2020 and so on third most used Japanese track on TikTok in 2020. "Pien" is meme which expresses sad feeling was awarded 2020's new word grand prize from Japanese dictionary maker.
The sound is very nostalgic 80's sound might remind you children's song.