Rin lives a quiet life as a full-time housewife. Before marriage, she dated a reckless man and indulged endlessly in pleasure. One day, she unexpectedly reunites with her ex-boyfriend. Though initially wary, she gradually opens up to Hiroshi, who claims to have changed for the better. Drawn to his charm and seduced by his insatiable, rock-hard cock, she lets him creampie her repeatedly, even on her fertile days. One day, overcome by anxiety, she takes a pregnancy test—and the shocking result leads to an unimaginable turn of events.