This is a piece I actually used as an icon a few years ago.
In 2017, I created a cork coaster merchandise exclusively for an event called Comic Market. This is the original drawing.

"Hoshi-kun", the character in the music video for the song "And then you Became the Moon", is the icon wearing the outfit I use in my live performances.

1134 x 1134px lossless png. 2017.