少し前ですがyoutubeにメイキングをアップしておりました＿φ(.. )
https://www.youtube.com/watch?v=gcmt_Eas0zY&t=32s

It was a little while ago, but I uploaded a making-of video to YouTube. ＿φ(.. )\nhttps://www.youtube.com/watch?v=gcmt_Eas0zY&t=32s