My girlfriend's younger sister moved into our room while we were living together... Even with her older sister right next to us, she still seduced us with her marshmallow-sized breasts!! (Kosaka Aoi DVRT-051)

My girlfriend and I were living together while we were getting ready to get married, but then her younger sister came to stay. This sister was awful; she had incredibly beautiful, huge breasts and a baby face, like she'd inherited her sister's small breasts—a total killer for nipple lovers. Even with her sister right there, she still managed to "seduce" me with her breasts, which I couldn't resist—no, I couldn't resist. I was sandwiched between her marshmallow-like breasts, enjoying a breast-sex paradise until my scrotum was completely drained, leaving me weak and powerless.