Rui is the dropout of a ninja village. Unable to keep up with training, she became an errand girl. Feeling bitter, Rui trained herself and gained strength. One day, Rui asked a high-ranking ninja for swordsmanship practice. Initially reluctant, the high-ranking ninja was surprised by Rui's skill. Although he acknowledged her intelligence and swordsmanship, he said that a kunoichi is useless if she can't use sexual techniques. Rui declared, 'I will endure any training,' and from that day, training in sexual techniques began. They applied secret medicine all over Rui's body and twisted sweet potato stems into her vagina and anus…
