In this story, popular AV idol Rinko has been secretly dating her manager Hideki, and their relationship seems perfect. However, there's a dark secret that Rinko carries - she takes care of her reclusive brother Kyouji's sexual desires. When Rinko reveals her relationship with Kyouji through audio recordings, everything changes. Her career starts to crumble, and her life spirals out of control. This twisted tale follows the lives of these siblings, including their incestuous daily routine involving tight vaginal grips around each other's cocks, their father's approval of their taboo relationship, and the question of how long this depraved lifestyle can continue.

グラドル玲子は、マネージャー英二と密かに付き合っていて、仕事も順調だった。しかし玲子には引きこもりの兄・幸雄の性欲処理をしているという重大な隠し事があった。ある日、幸雄との関係を語った音声を玲子は英二に聞かせることになった。それ以降、仕事を降ろされてしまった玲子の人生は破綻していく。クズな兄と妹の歪んだ日常、 膣内で兄の肉棒を締め付ける妹、父公認の相姦関係、この日常はいつまで続くのだろうか…。