Now in her fourth year as an AV actress, the soft-bodied Lolita girl has grown into a beautiful young lady. I first met her two years ago in a serious SM show called "Junjou" Nana shot "Niku-Daruma". Her flexibility and physical strength, which she had trained since childhood in classical ballet, were genuine. Even when tied up on the floor in a Niku-Daruma position, Nana was completely fine. Normally, this would be a very painful torture pose that would cause pain in the hip joints, legs, and ankles, but Nana had top-class flexibility. And when she was hung up in the air in that position, Nana felt pain for the first time! This is because her entire body weight was on the rope, and the rope was digging into her thighs and legs! It was a pain like the flesh of her thighs was being wrung out like a rag! At this time, Nana experienced the pain of SM bondage for the first time. Two years have passed since then, and Nana is desperately facing the world of SM and trying to grow, even at her SM Night live performances. She has shown many times on the SM Night stage how to tie herself in poses that no one else can do, making use of her flexibility. But Nana was not satisfied. When I saw Ayano Shiomi, who is also a member of the M-girl group, play, whether it was the ultimate bondage, candle torture, or whip torture, she was in pain and agony, and every time I saw her urinating and going crazy, the competitive athlete blood inside Nana started to boil! How can I become like Shiomi? For Nana, the main theme was to expose her eroticism in bondage SM play. That's why I decided to ask legendary bondage artist Akira Naga to be the bondage artist for this shoot. I don't need a bondage performance that makes use of Nana's flexibility! I want to push Nana's body and mind to the limit with serious bondage training and Naga's torture rope! That's why this work is a complete documentary of Maeno Nana's challenge to serious SM!