The Hacka Doll app provides a tailored news feed for every user. Upon first launch, the user answers a few basic questions, allowing the app to filter news based on their personal interests. Through daily usage, the app automatically analyzes and learns which articles the user reads, recommending content to further personalize the feed. The anime personifies the app's customization engine as three "Hacka Dolls": Hacka Doll #1, the personal entertainment AI and main navigator; Hacka Doll #2, the anime expert; and Hacka Doll #3, the knowledgeable otaku.