The poor younger sister watched her stepsister having sex with her best friend

The poor little brother watched his stepsister having sex with his best friend: This boy invited his best friend home to play. He didn't understand what the other boy's taste was, but he also liked his best friend's older sister named Nao Jinguji. . Nao Jinguji didn't pay much attention to these kids, until the other boy approached and propositioned his sister. Nao Jinguji seemed carefree at first, but the other boy didn't give her a chance to answer and just kept fucking her to a pulp. When his younger brother saw that scene, he could only cry. Will the two be able to get together when the age difference is quite large?