My stepsister is an average-looking girl who wears glasses and has a full bust, but I can't stop living with her. —Kashiwagi Konatsu XVSR-852

My stepsister suddenly appeared after my father remarried. At first, I wasn't interested in her plain, bespectacled, and gloomy personality and appearance, and lived a mundane life. Then one day, wanting to have a little interaction, I went to her room and witnessed her masturbating. Her incredibly large breasts, unimaginable given her ordinary, bespectacled appearance, immediately captivated me! After entering the room, I used her toys to help her masturbate, becoming extremely excited by her erotic behavior. Then, I performed oral sex on her, and then had my hard penis penetrated her without a condom. My stepsister's cute stepsister brother took her to his room and had sex with her without a condom. Finally, even my stepsister's father, who suddenly returned home, joined in, enjoying a de facto threesome and forbidden cohabitation sex!!