Under the cruel direction of her uncle, who needs money to repay his debts, his niece "Rin" is forced into appearing in a video. Wanting to hide her face with a mosaic, she suggests filming a pissing scene. For her uncle's sake, she reluctantly agrees to only that. However, the director isn't satisfied and forcibly confines her, ultimately breaking her hymen. A merciless adult ritual inflicted upon a pure, innocent girl—capturing the harsh weight and painful reality of becoming an adult.