Summer break, the naive schoolgirl Koune asks her parents for permission to visit her older siblings in the city for a while. This may be the most memorable trip of her life, as it caused her to lose the most precious thing for a girl, but also made her a mature woman. To let her younger sister experience the interesting and new things in the city, her older sister took her to a familiar massage parlor that she often visited when tired. The two sisters were served by two male employees separately. At first, he massaged her very comfortably and pleasantly, but as time went on, she felt more and more strange, as he had taken off his shirt and used his fingers to caress her breasts and even licked them continuously, and even inserted his fingers into her vagina, making it wet. Although she knew she encountered a lascivious and perverted employee, what he did really made her feel pleasure, sensations she had never experienced before. However, her own leniency and indulgence caused her to lose her virginity - a priceless treasure on a woman's body.