This is a painting application that two people draw one picture.
Many japanese youtuber have played and submitted video on Youtube.
For example,,,

●はじめしゃちょーさん（No.1 Youtuber in Japan）
https://www.youtube.com/watch?v=-Xa4mo9SOj8

●キズナアイさん（No.1 VTuber in Japan）
https://www.youtube.com/watch?v=HDEYQ-PEmDk&feature=youtu.be

●スカイピースさん
https://www.youtube.com/watch?v=hjNupczbVHM

●アブ -abu-さん
https://www.youtube.com/watch?v=pfX9OAmPduI

●えっちゃんねる/悦子さん
https://www.youtube.com/watch?v=DXtCZejxBqc&t=6s

●しゅうゲームズさん
https://www.youtube.com/watch?v=E0V4mvEhNYs