Mai is a girl working part-time at a darts bar, known for her cute, slightly lisp-like speech that makes her popular with customers. Today, with few guests around and the manager having left early, Mai finds herself alone in the store. With work over, she decides to relax by masturbating. She shows off her figure in the swimsuit she wears for customer service, and—being the enthusiastic performer she is—changes into even sexier lingerie, continuing her masturbation with fully erotic poses. Her innocent demeanor and genuine pleasure, stolen in the quiet moments between shifts, captivate the viewer.