Because of the custom in the countryside that "the younger sister belongs to the older brother," I spent my summer vacation ejaculating 10 times a day inside my busty stepsister, who became my personal ejaculation target. (Yuzaki Karen PPPE-401)

In the ingrained, biased age-based social norms of the countryside, my family believed "the younger sister belongs to the older brother." In the closed-off atmosphere of the countryside, no one reprimanded me, and my parents didn't stop me. Whether it was while reading, under the dining table, or standing naked in the kitchen with my apron, "I have to listen to my brother," I'd say, shyly but naturally spreading my legs. A pure expression of pleasure amidst shyness, an unconsciously overly erotic body. Initially confused, we unknowingly became incredibly compatible, indulging in each other. "The madness of a confined space" x "A countryside summer that never ends sweetly." Missionary position, riding position, rear-entry position, sitting position, oral sex, breast sex, masturbation… repeatedly, repeatedly, with constant ejaculation inside.