In high school, I met a 40-year-old "uncle" at a karaoke box, and that's how it all started. I still remember that moment vividly. We were just talking inside the karaoke room, but before I knew it, once we were alone in a private booth, he suddenly said, "Let's try doing it with your mouth." My heart pounded as I reached into his pants and grabbed it—his cock was huge and already slick with pre-cum. I got so turned on by the sensation that I instinctively straddled him. He became more aggressive, touching my body over my school uniform, sliding his hand under my skirt and pulling my panties off. Then, he buried his face between my legs and gave me my first cunnilingus. The feeling of his tongue was incredibly pleasurable. I tried to hold back, but I couldn't resist—I let out moans without realizing it. He whispered, "You're getting wet, huh? Such a naughty girl," and those words only made me hotter, making me soak even more. Then he said, "Try licking me..." I pulled out his cock and started licking it all over with my tongue, slowly and thoroughly. It was big and rock-hard, and just seeing it excited me. I took it into my mouth, sucking with wet, slurping sounds while moving my head up and down. Looking at his face, I could see he was deeply aroused—his eyes half-closed, looking so cute. Wanting to make him feel even more, I sucked hard on the underside ridge, and suddenly he came, shooting his cum into my mouth. I swallowed it all. He looked shocked, yet incredibly turned on by my actions. After finishing, I climbed back on top of him, and he shoved his face into my uniform skirt, eating me out with loud, squishy sounds. The way his tongue moved inside me felt amazing, and as I moaned uncontrollably, suddenly the karaoke staff burst into the room. I jumped away in shock, but when I looked at him, I saw he had made eye contact with the employee. It was so awkward. The staff member quickly left, but afterward, he kept giving us sly, knowing smiles, which made me extremely embarrassed. Still, that experience remains one of my most thrilling, heart-racing memories.