[sciolistse]

There's a link at the bottom of the readme.

https://www.pixiv.net/en/artworks/78375860

Seems to require login, though.

[userbinator]

View Source, and you can find the direct link...

https:// i.pximg.net /img-original/img/2019/12/20/00/00/03/78375860_p0.png

(Deliberately made unclickable, because you will get a 403 unless you send the correct Referer.)