A young lady who is easily influenced makes her debut. A 24-year-old young lady born and raised in Nagasaki, a graduate student at a certain national university, makes her exclusive debut. Mio, a top student and highly educated young lady with an elegant face and a translucent, fair Mio, is so shy and naive that she gets nervous, but when sex starts, she shows a glimpse of her ``actually, quite sensitive'' and ``actually, quite lewd'' side. She is taught how to use the toy and the stimulation and pleasure, and her beginner body reaches climax many times in this first experience with a vibrator. In the end, she experiences her first squirt and her first ever threesome, making this a debut work full of firsts.