there was a popular channel on YouTube run by a guy about 16-18 years old. it was a channel about different rhythm games(project sekai,D4DJ,BangDream..).

Once on his stream, his face flashed for a second in the reflection of his iPad screen, and then the whole Internet was in it, your recommendations on TikTok too. he once streamed and played Project Sekai. his hands, as usual, moved very quickly and beautifully across the tablet display,when he is currently playing song on APPEND