Aggressive Retsuko is a tV short anime that premiered in spring 2016, produced by Fanworks.

About the production: the story comes from an original script, there are 100 episodes of about 1 minutes and its current status is "finished".

Its main genres are comedy, music and slice of life, with themes such as Episodic, Work, Office Lady and Primarily Adult Cast.

On AniList, Aggressive Retsuko has an average score of 72%, a good score, and appears on 18,150 users' lists.

The show centers on Retsuko, a 25-year old red panda who works in her dream company's accounting department. But it turns out that she is forced to keep doing more and more impossible tasks by her superiors and co-workers. She doesn't talk back to them, but she still has to let off steam, so she ends up going to karaoke by herself and singing death metal. (Source: Anime News Network)

Official synopsis from AniList.