July 16th, the night of Nanairo. A fated night in which a mother and son, bound by tradition, consummate their relationship under the watchful eyes of their family. A sharp portrayal of the darkness lurking within contemporary rural Japanese society. In this family, the eldest son—the heir—must, at the age of sixteen, fulfill his coming-of-age ritual by engaging in a single night of intimacy with his own mother. This story delves into the emotional turmoil of a family ensnared by this harsh tradition, exposing the complex human relationships hidden beneath. An ultra-authentic erotic picture scroll blending intense sensuality, taboo customs, and incestuous desire. A grand, immersive work that captivates readers with its power and depth. [Bonus slideshow not included]