During a trip, I unexpectedly shared an intimate moment with Mizuki-chan (20 years old, second-year university student). She seemed completely relaxed throughout the journey, creating a comfortable and easygoing atmosphere. We played drinking games like baseball ken, and spending time together in the bath naturally brought us closer. Having unprotected sex in the mixed bath was incredibly pleasurable for both of us. Despite her slender frame, she has a well-defined body and shapely, full breasts that swayed erotically with every movement. Her tight pussy felt amazing, and I couldn't help but cum inside her by the end.