A defenseless, busty sister gets fucked by her super-strong younger brother. She thought she was seducing her virgin brother, but... it turns out to be a surprise!

Mio, who was a model in Tokyo, is heading home for the first time in a while. His parents are happy to see him reopening after a while, but his younger brother Jun is a tangled person, and apparently he is not going to school and staying home without going to anything. If that were the case, she teases her, "If I'm going to school, I'll let you touch her breasts...", but this awakens her younger brother's lying sexual desire, and her huge breasts are roughly choked and creampied inside her in a crude sex. From that day onwards, my brother who has an extremely horny ends up chasing me around all the time...