Premature sex education for 100% innocent beautiful girls. Their bodies have gradually developed. They're at an age where they're gradually becoming interested in naughty things. The lewd activities of a younger sister who has awakened to sex without even realizing it! When she sees a stiff penis in front of her with her innocent face, she shows her curious side and is overcome with the urge to take it in her mouth, and she opens her mouth wide and takes a sticky load. The moment she takes it in her mouth, the excitement of youth reaches her entire body! She makes slurping sounds...