My best friend's girlfriend is unbelievably cute, and gets excited by doing something forbidden with someone else's partner. She secretly invited me over, careful not to let my best friend find out. I hesitated, torn between preserving our friendship or seizing this once-in-a-lifetime chance—but before I knew it, her hands had already captured my heart. Even with that adorable face, she makes my heart race uncontrollably. I'm terrified we'll get caught, guilt starts to creep in, but the situation has already become dangerously intense.