My younger sister Sakura became a college student and one day she said, 'I missed the last train,' and came to stay over. Her body, which I hadn't seen in years... especially her breasts, had grown enormously, and her exposed cleavage was hard to ignore. Unable to sleep due to my restless thoughts, Sakura lay beside me, breathing heavily in her sleep. But as she rolled over, her massive breasts were about to spill out of her top. No way, even if she's my sister, I can't hold back! Carefully, I groped her breasts and sucked on her nipples, her breaths becoming hot and erotic. I stopped just before she woke up and reflected on my actions, but the next week Sakura came to stay over again, and the uncontrollable nightly urges escalated...!
