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, just like that and brutally fucked her to pieces. 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?