My girlfriend has a younger sister, her name is Hina-chan. Contrary to her innocent appearance, she has huge H-cup breasts. Moreover, it seems she has never had a boyfriend. I have been secretly in love with Hina-chan for some time. Then, one day when she was away on a business trip, I attacked Hina-chan. I licked her lips, kneaded her breasts, and sucked her pussy, thrusting my dick deep into her vagina and ejaculating! I told Hina-chan that I loved her as she sobbed.