On a cloudy day at a Shonan beach, a couple in swimwear flirt passionately, drawing glances from others around them. After checking into a hotel, she's teased on the sofa without removing her swimsuit, writhing in ecstasy with her tanned, sun-kissed body fully exposed. Following creampie sex, fireworks light up the night sky as they prepare to head home—but overcome by desire for his rock-hard cock, she starts sucking him off and gets fucked again.