The manga starts with Kazuki, a university student in Tokyo, visiting her family during spring break. At first, her parents were pleased by her visit, but Kazuki doesn’t return to Tokyo even after a few days. And then one day, she just tells her parents that she left university. She has no aspirations and so starts the story with her; she is being lazy at home as a "bonkura musume" (Note: Bonkura is an absent-minded, slow or dull person).

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