Seiko is a temporary employee working in the accounting department of a major mobile phone manufacturer. Normally quiet and gentle in demeanor, her behavior in bed is completely different. When a vibrator is applied over her panties, her body reacts instinctively, causing her to lose control and pee uncontrollably, soaking the floor. Her honest reactions make her even more attractive. During service scenes, she opens her small lips wide and looks up with a masochistic expression full of resentment, further highlighting her appeal. This stark contrast to her everyday self creates a captivating presence that draws viewers in.