Also excuse my double posting, but although I've never seen that anime, I know it uses a composer called Hugo Wolf for the theme song who you may want to check out in general.
There is only one artist whose work I ever keep track of and that is 람다람/RDR/Ramdaram.
They used to only do "animation memes"/animated music videos with their characters.
But very recently they have branched out and started during freeland illustrations and animated music videos for indie/budding musicians and bands online.
Their artstyle is pretty cartoony, and they go for the obvious retro/vaporwave aesthetic that is so popular these days, but watching this person becoming somewhat "mainstream" after just a couple years felt satisfying and deserved.