en Cuevana 3. Aiko, a self-proclaimed 23-year-old young lady, was enjoying a conversation with a customer at her favorite bar. Konosuke, a casual visitor, watches Aiko having fun, but is invited to the hotel by his girlfriend Aiko... Konosuke is a former high school teacher who is currently a black money collector. However, due to his innate weakness, he repeatedly falls into debt, and his older brother forces him to shoulder the debt. A aimless Konosuke sets his sights on Aiko, but...