Karen and Yuki were assigned to Osaka on a business trip, but when the storm suddenly landed, all public transportation stopped working, and they had no choice but to spend the night here. Unfortunately for both of them, the hotel only had one room left, so the two had to share a room together. When they arrived at the hotel, both Karen and Yuki were completely soaked. The clothes were so wet that her underwear and flesh, part of Karen's big round breasts appeared in front of Yuki's eyes! A young adult who has never been fucked like Yuki can't take his eyes off this beautiful boobs! Karen saw it, but because she knew that Yuki was a new boy, she deliberately teased him, poking out part of her chest for Yuki to see. Unable to resist, Yuki suddenly attacked Karen. At first, Karen also resisted, but because Yuki was still a new boy and had never known about sex, she was also reluctant. She agreed to let him kiss, squeeze his breasts, and then suck his cock. But how could that be enough? Yuki wants more, he wants to be a man! But because it was the first time, Yuki quickly ejaculated. Still, his cock was erect, and he begged Karen to let him fuck her again. Karen agreed, she began to teach Yuki how to wear a condom, how to fuck each other, how to hook her pussy... Yuki's technique has improved significantly, and he even makes her happier than what her boyfriend brings. Karen became more and more affectionate with Yuki, the two of them fucked each other all night, until the next morning when it stopped, the trains resumed operation...