"I provided support for you so that you wouldn't end up as a lowlife like myself." "Hng... Ah, Mister..." "Do you really think I would find it entertaining if you opened your legs for a scumbag like me, Nabom? Huh?" It has been five years since Nabom lost her parents due to an accident and began living alone with her sick grandmother. One day, she stumbles upon her grandmother's bankbook, which is filled with monthly deposits from a man she has never encountered. The sponsor, whom she had envisioned as having a kind and friendly appearance, turned out to be... a gangster.