Bound in a straitjacket with her legs suspended, the helpless woman becomes completely immobile, exposed to relentless tickling torment. Riko can only writhe and squirm in resistance as she's meticulously tickled all over her body. The gaps between her school swimsuit and the straitjacket reveal her buttocks, thighs, and sensitive sides—prime targets for tickling that push her to scream "No, no, no!" in overwhelming sensation. With her upper body tightly restrained and nearly unable to move, her lower body and sides become especially vulnerable, adding to the appeal. In the latter half, oil and brushes are used to torment her soles, creating a different kind of frantic struggle compared to when she was in leg irons. This release is perfect for those who enjoy watching Riko writhe helplessly while immobilized in a straitjacket and mercilessly tickled.