The story follows Niido Akiho, an 18-year-old college student leading a fulfilling life, except for her unemployed sister, Kana, who is staying with her. Akiho struggles to manage her sister\s untidy habits. Their situation takes a turn when Chifusa, a busty woman identifying herself as a \debt collectors,\ visits them. She informs Akiho that Kana has accumulated a debt of 3 million yen. Unable to repay the debt, Chifusa offers them a \Problematic Part-Time Job\ in exchange for a high pay. The job\s details remain confidential, leading to a slightly erotic work comedy about two sisters entangled in a peculiar debt.