Kurumi is a wife who has given birth and is living happily as a mother of one child. However, she has not had sex with her husband since giving birth, so she has no choice but to satisfy herself by masturbating. One day, while cleaning, she is feeling frustrated and annoyed when she accidentally sees her neighbor, Kuniaki, masturbating. Far from feeling disgusted by his cock, which is even more impressive than her husband's, it ends up igniting the desire that has been smoldering inside Kurumi. A few days later, when she visits her neighbor, she takes advantage of the fact that only Kuniaki is there and goes in...