The innocent girl I found on SNS turned out to be a pervert! Kokoro-chan, 19, from the countryside. One day by the river, she discovered it and awakened to her sexual desires! Every day during her student days, she couldn't stop masturbating. After her long-awaited move to Tokyo, she got into matchmaking and had her first experience at 18, with over 50 people in half a year! Why did she appear in an AV? A thorough investigation!