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My girlfriend has a younger sister, her name is Hina-chan. Contrary to her innocent appearance, she has huge H-cup breasts. What's more, it seems she hasn't had a boyfriend for a long time. I've been secretly in love with Hina-chan for a while now. And one day when she was away on a business trip, I attacked her. 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.