In 2xxx, amidst a highly-developed information society, human beings are drowning in a sea of information. This leads to a situation where people cannot find the necessary information. The only hope to solve this problem is a navigator program... Hacka Doll.

Miyu Takagi
Hacka Doll #1 (voice)

Kaya Okuno
Hacka Doll #2 (voice)

Nanami Yamashita
Hacka Doll #3 (voice)

Reina Ueda
Hacka Doll No.4

Ryoka Yuzuki
Hacka Doll No.0

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The Hackadolls get mixed up with a hard-as-nails production assistant and wind up advancing an anime. But, when faced with the gap between fantasy and reality, the girls are crushed. They shall continue to work like dogs until KUROBAKO's White Box is complete.
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The ditzy Hackadolls #1, #2, and #3 make their debut as official Personal Entertainment AI. However, since these girls are so unbelievably ditzy, they use their own physical presences to take on human job requests.