Gravure idol Reiko was secretly dating her manager Eiji and her work was going well. However, Reiko has a serious secret: she is managing the sexual desires of her reclusive older brother, Yukio. One day, Reiko decided to let Eiji listen to the audio of her talking about her relationship with Yukio. After that, Reiko's life falls apart as she is let go from her job. The distorted daily life of a trash brother and his girlfriend's younger sister, the younger sister tightening her brother's cock inside her vagina, the incestuous relationship approved by her father, how long will this daily life last?