It's been about a week since I had dinner with my girlfriend and her younger sister. Her sister, whom I've only met once, suddenly called, saying, "I missed the last train, can I come over now?" Before I could refuse, the doorbell rang. Hana, who came over slightly tipsy, was uncharacteristically close, and her cleavage was peeking out from the borrowed clothes she was wearing. "I didn't tell my older sister I was coming, it's fine, right?" Everything she does and says feels like an invitation. I can't help but think, "I can do it, I can do it" (gulp). Only 10 seconds left before I give in to this forbidden relationship...