When Nao Yuki appears, this becomes a standout work showcasing her delightfully mischievous side as a tickling tormentor. This time, she uses tools that catch her interest, delivering relentless tickling combined with verbal teasing that leaves no escape, mentally or physically. At first, she uses long feathers and her hands, lightly brushing and tickling in various spots, creating a sensation where you can't tell which way to move or where to run. Nao teases with a sly grin, saying, "When I attack multiple spots at once, you don't know where to move anymore, right?" carefully observing your reactions. Her playful chant of "kochoko kochoko kochoko~" further intensifies the psychological stimulation. In the latter half, a tickling electromagnetic rod introduces a new kind of sensation, amplifying the pleasure even more. A particularly memorable scene features her pinning you down with her body, cornering you at the edge of the sofa while whispering, "There's no escape for you, you know?" This moment perfectly highlights her cruel, teasing dominance, executed with brilliant flair. This is a must-watch for anyone captivated by Nao Yuki's wicked older sister persona and who longs to be tormented with a smile.