Juuni-nin no Onna Kyoushi  

12 Female Teachers, 12인의 여교사, Dirty by the Dozen, 十二人の女教師, Juuninin no Jukyoushi, Juuninin no Jokyoushi, Juuninin no Onna Kyoushi

The headmaster of a school is attempting to train twelve teachers as sex slaves for his nephews, who are also involved in the scheme. They will use any means necessary to convince female professors to share their sexual knowledge with them. However, even if these women agree to give themselves over freely, they may not do so without putting up a fight. There is no shortage of extracurricular activities at this school that promote lustful learning.