Put it as artist request as I am unable to determine if the pixiv account that uploaded this was the actual artist or if this is a commission as the style is identical to bzs (kage no shinobu) while this account had no other art.

matteste said:

Put it as artist request as I am unable to determine if the pixiv account that uploaded this was the actual artist or if this is a commission as the style is identical to bzs (kage no shinobu) while this account had no other art.

Commentary confirms this (using part of the artist's Chinese username, "Self-Flying Shuriken").

Also translated the commentary.