One day, Mio (Yume Nikaido) learns that her older sister, Tetsuko (Moe Tenshi), has been using the "Hadaka-ken" technique to protect the family home all by herself. After witnessing Tetsuko's failure to use the "Hadaka-ken" against a powerful opponent, Mio decides to learn the "Hadaka-ken" herself and fight. Will Mio be able to avenge Tetsuko's death?
Yume Nikaido is a Japanese AV actress active since 2020. She debuted in March 2020 for FALENO, when she was still in college. She ranked 3rd in the monthly FANZA actress popularity ranking in December 2020. She is a returnee and can speak three languages. She has lived in the United States and Canada for a full three years in high school and speaks English fluently, she also speaks Korean to some extent. Her hobbies are watching movies and her special skill is massage. One of the reasons she wanted to become an AV actress was because of the recognition Sora Aoi had during her high school days when she lived in the United States.