Mio, a wife whose husband has been working away from home, has been bored and sexually exhausted lately. What's more, the wife next door, Sayaka, is in her last month of pregnancy and she's fed up with her neighbor's bragging about being pregnant at every opportunity. Then, Mio Mio her neighbor's husband, Shinichi, watching her masturbate... To get revenge on Sayaka and relieve her own sexual frustration, she invites him over to her house and devours his cock, letting her lust out. Although she says it'll only be once, Shinichi is swept away by Mio's lewd temptation...