性欲が強い爆乳リカ。夫は海外勤務中。SEXは帰国した時だけで、欲求不満の毎日。義姉が仕事で留守なため実兄宅に家事を手伝いに行く。そこには可愛がっている甥がいる。性欲のはけ口として甥や実兄と関係を持ってしまう。
Rika has a strong sex drive and big tits. Her husband is working overseas, and she only has sex when he returns to Japan, which leaves her frustrated. Her sister-in-law is away for work, so she goes to her brother’s house to help with the housework. There she finds her nephew, whom she adores. She has relations with her nephew and brother-in-law as an outlet for her sexual desires.