地元を離れ東京で暮らしている僕は、休みを利用して久しぶりに実家へ帰ってきた。実家には両親と祖父が住んでいる。祖母が亡くなり、落ち込んで元気のない祖父を母さんが介護しているのだが、父は家庭に関心がなく、出歩いてばかり…。そんなある日、祖父の部屋から発情期の猫のような鳴き声が漏れてきた。気になった僕は静かに障子を開けてみた。すると…部屋の中では乳をしゃぶられ、祖父のチンポを愛おしそうに貪る下品な母さんの姿があって…。

I live in Tokyo, far from my hometown, and I took advantage of my time off to return home for the first time in a while. My parents and grandfather live there. My grandmother passed away, and my mother is taking care of my grandfather, who is depressed and listless, but my father has no interest in the family and is always out and about… Then one day, I heard a sound like a cat in heat coming from my grandfather's room. Curious, I quietly opened the sliding door. And what I saw was… my mother, in a vulgar state, having her nipples sucked and lovingly devouring my grandfather's penis…