PPPE-291 Don't tell your parents, okay? The big-breasted younger sister is a new prostitute who loses to the full course of her breast-shut-up technique and ends up having sex with her trash brother.

When I happened to go to an adult entertainment shop, I picked a new big-breasted sex worker, and it turned out to be my younger sister...I had a stance of I'll report it to my parents, and my younger sister, who told me not to tell her parents, got into a fight. I'll do anything if you keep it a secret! When my younger sister begged, I blurted out, ``Okay, let's have a full course with big breasts,'' but unexpectedly, my younger sister was okay with it. From that day on, even if my sister makes me ejaculate using the sex techniques she learned at the store.