"Hacka Doll the Animation" is a short-form anime series based on the mobile app "Hacka Doll," which serves as a news recommendation service. The story revolves around three android assistants, known as Hacka Dolls, designed to help users by providing tailored information and entertainment. The Hacka Dolls—numbered #1, #2, and #3—each possess distinct personalities and abilities. #1 is cheerful and energetic, #2 is calm and intelligent, and #3 is shy and reserved. Together, they navigate various comedic and lighthearted scenarios as they attempt to assist their users, often encountering quirky challenges and misunderstandings along the way.

The narrative unfolds in a futuristic setting where the Hacka Dolls are tasked with supporting a human protagonist, referred to as "Master." The Master is an ordinary individual who interacts with the androids, often finding themselves caught in absurd or humorous situations due to the Hacka Dolls' unconventional methods of problem-solving. The series employs a episodic structure, with each episode presenting a self-contained story that highlights the Hacka Dolls' attempts to fulfill their mission, often with mixed results.

Throughout the series, the Hacka Dolls encounter a variety of characters, including rival androids, eccentric users, and other entities that add to the comedic tone. The interactions between the Hacka Dolls and these characters drive much of the humor and charm of the series. Despite their advanced technology, the Hacka Dolls frequently struggle with human emotions and social norms, leading to comedic misunderstandings and heartfelt moments.

The series balances its comedic elements with occasional moments of sincerity, particularly in exploring the Hacka Dolls' growing understanding of human behavior and their own identities as artificial beings. While the primary focus remains on humor and lighthearted entertainment, the narrative occasionally touches on themes of companionship, purpose, and the relationship between humans and technology. The Hacka Dolls' journey is marked by their evolving dynamics with each other and their Master, creating a blend of comedy and subtle character development.