sister slave and koji academy, tsukino yuria, kangetsu is good

She's a young girl who is engaged to a school teacher. However, Yuria had a native masochronous coffin that eventually smelled S-man and forced him to fall in love with her brother-in-law. Soon, he was captured by the head of a hentai school and is said to have been deceived from the peak of happiness to prison, and his sister who volunteers for hard training without suppressing the desire for persecution. Using all means of publicity, jealousy, conspiracy, atrocities and maniacs encircle beautiful sisters. To get drunk and drown in the sense of virtue, intense excitement and high pleasure of logic.