妊活に悩まされる日々を送る夫婦の元に颯爽と現れた謎の隣人。実はその正体は托卵を趣味とする絶倫男だった…！夫との作業のようなSEXに満足のいかなかったまひろは、絶倫男に触られる度に欲情していき鬱憤と共に潮吹き大絶頂。次第に自ら隣人のち〇ぽと精子を欲するようになり、夫の前でも堂々と不倫中出しSEX！

A mysterious neighbor suddenly appears in the home of a couple struggling to conceive. It turns out he's a virile man who enjoys cuckooing! Mahiro, unsatisfied with the perfunctory sex with her husband, becomes increasingly aroused each time the virile man touches her, reaching explosive orgasms and squirting climaxes. Gradually, she begins to crave her neighbor's penis and sperm, even having unprotected sex with him in front of her husband!