Aggretsuko is a Japanese comedy anime about a 25 year-old accountant named Retsuko who hates her job. After dealing with the minutiae of her job and co-workers, most notably her "pig" of a boss, Retsuko vents her frustrations by singing death metal karaoke.
The show was released on Netflix in April 2018, with a 10-episode season.
https://www.youtube.com/watch?v=bY4mWEYKuZ8
