Aya Shitara, a masochistic actress, is summoned by her master today and taken to a park. Initially reluctant to expose herself outdoors, Aya ultimately has no choice but to obey her master's commands. Ordered to walk through the park with a hidden vibrator inside her, she struggles to resist climaxing despite strict instructions not to. Unable to endure the overwhelming pleasure, she finally gives in... As punishment, her master begins an intense and merciless training session.