[Revived as a timeless classic with the latest AI remastering technology!] This title has been upgraded from its original SD video to high-definition HD quality using advanced AI remastering techniques, allowing fans to enjoy a legendary masterpiece in a whole new dimension. While the original content remains unchanged, the enhanced video quality delivers a far more immersive and vivid experience. In an old-fashioned Japanese house lives Katsu, a widowed woman dressed in traditional kimono. She is the matriarch of the "Ura-Nishimoto" household, and when her son, Shuichi, returns home for a visit, she calls him into her room. Shuichi, the rightful heir to the Ura-Nishimoto lineage, is still a virgin—and in order to master the ultimate secret technique known as "Female Body Landscape," he must undergo a sacred ritual performed exclusively by his own mother. Now, Katsu sets out to awaken her son's desires and fulfill this forbidden rite.