It's about a tired female office worker with a depressed (borderline obsessive) music producer, yandere I think. I read it on bat0, but I can't find it
I want to see hard working student that gets good grades (for motivation) like geniuses, i like Life of a Magic Academy Mage. That kind of manhwa but any is fine as long as it's abiut studying (not school life )
The S-class item is actually his white t-shirt, not getting dirty after several attacks lol