Five years into her marriage, Mirai lives a quiet life in the village with her husband and father-in-law. However, there is a secret she must keep from her husband. After retirement, her father-in-law found new purpose in drawing, and began sketching Mirai's figure while her husband was away. Gradually, his drawings became increasingly explicit—depicting Mirai's anus, her urinating, and even her defecating. Though disturbed by her father-in-law's shameful acts, Mirai, suffering from a sexless marriage, begins to experience a new kind of pleasure.