Rui, a kunoichi, was one of the weakest in her ninja village. Falling behind in training, she was relegated to menial chores. Yet, believing in her own potential, she secretly continued practicing. One day, she requested swordsmanship training from a senior ninja. Initially annoyed, he soon grew astonished at her skill. Though impressed by her technique, he refused to train her further, stating that without mastery of sexual arts, she could never succeed on the battlefield. Determined, Rui declared, "I will overcome any training," and thus began her grueling regimen in sexual techniques. She endured brutal exercises—her body coated in secret herbal ointments, yam stems forcibly inserted into her vagina and anus...