A kind older sister smiles as she trains her impatient little brother to improve his premature ejaculation! When her girlfriend found out that his little brother had been dumped because of his premature ejaculation, he became the laughing stock of his class. His older sister Sora couldn't bear to see his poor little brother like that, so she trained him at home and school until his premature ejaculation was cured. Sora's pussy feels so good that he can't hold back and ejaculates, but she gently accepts him and keeps trying! She trains him thoroughly until he can satisfy his older sister.