It's from Gztale. The creator made a comic sadly they ended it. But feel free to check them out on deviantart. Their username is Glozy if your interested in checking the comic out.

Thank you ^v^

I can give you a short summary of it if you want.

Ok it's story time! *clears throat* *cough* *cough* Gztale is an au where almost all monsters are hostile towards humans, but only because king Asgore's rule that "No monster can help a human or else they will be deemed as a traitor." Frisk retested too many times causing glitches. Like her brother Jean (the soul of kindness) and the soul of justice to fall down together. Papyrus is now captain of the royal guards. Ganz helped the human (so did Undyne) they we're both deemed a traitor. Now they're both hiding in the ruins with Toriel. Mel is part of Ganz and Mel is short for melancholy. Mel wants to help Ganz suffer less by helping him. Basically that's the main thing that you need to know cause I'm not spoiling it! ^v^ The comic is really good I think you might like it.