My girlfriend's younger sister Rin-chan came to stay at the place where we live together for 5 days, but I couldn't resist seeing her naked body, so I sneaked into Rin-chan's room while she was sleeping! Taking advantage of her sensitive personality, she started licking her pussy and started licking his dick all the way to the base... and was surprisingly aggressive! I have sex with her over and over again when she's out for work...