It is Debt Note. Not Death Note ノートブック

What if instead of taking lives… you took back what you're owed? Debt Note flips the script on justice with a hilarious, biting twist. When a broke and bitter college student discovers a mysterious notebook labeled “Debt Note,” they realize that writing someone's name in it doesn't end their life—it sends them a very real and very aggressive debt collector. From unpaid rent to borrowed hoodies never returned, no debt is too small to be collected. Chaos follows as debts get personal, petty, and painfully awkward. A sharp parody of Death Note meets modern-day hustle culture, Debt Note is a wildly entertaining ride through money, morals, and revenge—one IOU at a time.