In the middle of summer vacation, Rio-chan, a high school girl, shows up at the meeting spot. She decided to join simply because she thought, "It's summer break, I could use some extra cash to play with." Since she's on vacation, the crew takes their time seducing her. They first appeal to her desire to earn more money, complimenting her while gradually drawing her in. This successfully leads to using toys. Then, by stimulating her sensitive spots, they elicit strong reactions. It turns out she has a naturally horny personality—she doesn't resist being stripped, and instead actively enjoys being touched. Her high sensitivity soon has her moaning in a sultry voice. Just like the heat of summer, her responses grow deeper and more intense, leading to a fully satisfying result for the crew.