Mami is a 20-year-old college student. At 155cm tall, she has a petite frame and has decided to take the first step into adulthood by losing her virginity. Trembling during her first experience, she honestly exposes her body. She takes a cock into her small mouth for the first time, desperately moving her tongue while tears well in her eyes. Her pure expression deeply moves the viewer. Then comes the moment of penetration. Her small breasts tremble as she endures the pain, realistically portraying her transformation from girl to woman. Every single moment reflects the changes within her heart.