In this Magic Bus production, Saki's work assignment with a box of XL condoms pulls her coworker Keisuke into her apartment, where his perfect fit turns the task into something far more intimate. Her generous curves draw his attention while toys add playful tension to their private research, her lips offering teasing exploration before passion peaks in a deep creampie. Their shared discovery fuels the sensual heat of XL Joushi Season 1, blending professional duty with unexpected desire.