My sister becomes a sex friend and improves her premature ejaculation dick

A kind older sister trains her to improve premature ejaculation with a smile on her impatient younger brother's dick! My younger brother is so premature that he was dumped by her and becomes a laughing matter in his class. His older sister Sora couldn't see such a poor little brother and practiced naughtyly at home and at school until his premature ejaculation was cured. Sora's pussy is so good that she can't hold it in and she can't hold it in, but even in times like that, she gently accepts it and tries it over and over again! They thoroughly strengthened the girl until she was able to satisfy her.