A tiny squid girl shows up to invade humanity, gets immediately bullied into waitressing instead, and decides that's fine actually. Every episode is her getting distracted by surface-world nonsense, failing at her own invasion plans, and somehow becoming genuinely loved by the people she was supposed to conquer. The comedy lives in her absolute refusal to be threatening, even when she's trying the hardest, and her weird little squid logic making perfect sense to no one but herself.
An adorable squid girl emerges from the ocean with grand plans to invade humanity and punish the surface world for polluting her home. Armed with righteous anger and the ability to shoot ink, she's ready to conquer all. Then she gets sidetracked almost immediately. After a run-in with the Aizawa sisters and their beachfront restaurant, she finds herself working as a waitress instead of leading an army. Her terrifying invasion becomes an endless series of comedic mishaps as she attempts to balance her world domination agenda with actual job responsibilities. Every shift brings new opportunities for her schemes to unravel, whether she's dealing with demanding customers, bratty humans who don't take her seriously, or the simple fact that she's kind of terrible at being menacing. The show thrives on the contrast between her dramatic declarations of conquest and her very real inability to accomplish anything beyond serving food and cleaning tables. It's lighthearted comedy that never takes itself seriously, finding humor in a tiny squid girl's complete failure at being an effective villain.