Crawling under the kotatsu, I found several women sitting inside with their skirts lifted, their underwear fully exposed. I could see right into their panties, making it feel like a private panty-watching session. Staring at them, I gradually felt a surge of arousal. I decided to play a little prank, only to discover their panties were already wet. Apparently, the kotatsu was so warm and humid that they were sweating, and their cunts had become slick and aroused. They tried resisting my teasing, but pleasure overpowered them, and before long, right under the kotatsu and with family nearby, I boldly creampie-fucked them all.