Located in a corner of Shinjuku, ○○ Finance is known as a predatory loan shark operation, rumored to use forceful methods to collect debts—not just from borrowers, but also from guarantors, family members, or even lovers if payments are delayed. Burdened with her parent's debt, the daughter, Hikaru, is forced to take responsibility and support her life through daily work. How far will her fate be pushed to the edge? The desperate struggle and suffering of this young girl unfolds now!