GAJK-039 A schoolgirl undergoing rope restraint training inside a storehouse. A naive young woman who apprentices herself in order to take over her grandfather’s restaurant. Under the guise of training, she is drawn into a strange and degrading hobby… Usui Natsume

Natsume, the granddaughter, is shocked to hear that her grandfather plans to close the Western-style restaurant he has run for many years. After learning that the reason is his age and the lack of a successor, she offers to take over the shop and asks him to train her. From then on, after school, she begins learning cooking at her grandfather’s house almost every day. Her grandfather watches as his granddaughter steadily improves. But one day, after seeing her get into the bath to clean her soiled school uniform, he begins to develop improper feelings…