Muma no Machi Cornelica

Based on the erotic doujin game by Dieselmine (ディーゼルマイン). While working at a bar, the protagonist was asked to draw water. Upon picking up a mysterious stone he found there, he was whelmed by light. When he woke up, he finds himself in a country of succubi......! Various types of lewd demons draw near to him. He has to store a certain amount of magic energy in order to get back to his original world! What he will eventually face would be escape, or destiny to be a sperm slave forever... (Source: DLsite English)

Yuutousei Ayaka no Uraomote

An honor student, simple and pure who has no knowledge of adult things. One day a classmate asks her if she has a boyfriend, setting off a cascade of interest in sex and lust and debauchery.

In school trip to the nudist beach!!

Take a school trip to Nude Beach where this beach has rules for all visitors to be naked without dressing, and also men are forbidden to be aroused. However, if someone is aroused then someone will be given the opportunity to release his desire by doing pervert things in the tent. (Source: Nekopoi and Has Been Translated and Edited)

Sex ga Suki de Suki de Daisuki na Classmate no Anoko

Episode 1 - 2:</b> Sex ga Suki de Suki de Daisuki na Classmate no Anoko</i> Taichi Sano is short of money and, lured by the high hourly wage, applies for a part-time job as a camera assistant. While he is waiting at the location specified by the employer, his classmate Kanna Hiiragi appears. Kanna has a reputation of being the cutest girl in the school, and many boys confessed their feelings for her. Taichi also harbors a faint hope of dating her, so he hopes that this part-time job will be an opportunity to become closer to her. However, when Taichi finds out that the filming will be for an adult video, he tries to refuse, but Kanna accepts, saying that it will help her learn social studies. Taichi feels happy working part-time with Kanna. The part-time job is going well, although he is nervous about Kanna's occasional bold behavior. However, an accident occurs with the cameraman and actor, and Taichi has to suddenly take over. Kanna ends up doing the filming instead. Episode 3 - 4:</b> Hitori Ecchi:Onanie x2</i> Nitta is in love with Natsuki Amamori, who sits next to him. However, Natsuki is an honor student and Nitta is not good at studying, so there is no way they can be a match for each other, and she is a girl beyond his reach. What's more, Nitta has a hobby that he can't tell anyone about. He masturbates on Natsuki wherever he goes, even on school grounds. As he was thinking about Natsuki again today, he heard a noise. He peeked in that direction and found Natsuki masturbating. Nitta was transfixed by her. By chance, Natsuki found him. Seeing that she was about to cry after being seen in an embarrassing situation, Nitta confessed that he had been masturbating just a moment ago. (Source: Getchu, translated)