>>34243341There is a slightly higher res one on her twitter
https://twitter.com/KuruKen__/status/1375794501541789700 but I can't find the full HD version anywhere. Checked her Pixiv and she had only uploaded the graffiti on the wall.
https://www.pixiv.net/en/artworks/89237767 I'd say just ask on Twitter, worst case is she doesn't respond.
But if you really want it, you could try to recreate it in a vector graphics program like Inkscape by tracing over it. For "simple" things without much shading it's pretty easy.
