Hentai is based on original manga " Hypnosis Sex Guidance! / Saimin Seishirou "by Aiue Oka" 50 on!". 

"Rule number one, my name is Hajime Tanaka and I will be your official sex coach. Rule two-Before you fuck with your guys, all the girls have to go through sex training with me. Kissing or sex without sexual instruction is a crime. Who will commit this crime will be judged by all the laws of the criminal system. The third and last rule - You have to obey your coach... All guys with girls are required to bring them to me for training!"- these were the first words of a strange obsessed with lust hypnotist Tanaka-Sensei, said from the rostrum of the student Council...