A red panda that works in the accounting department of a large trading company. She thought she could live a colorful life after getting her dream job, but the reality did not turn out as she wished. Her self-centered colleagues drive her crazy while her superiors foist mountains of work on her. Aggretsuko cannot respond to them with her true feelings, she pent-up rage festers until... she goes to karaoke solo and vents her stress by singing death metal.