Sakurai Shachi

At a school where boys are a minority, Ayuchi has been bullied by the girls in his class. One day, he receives a mysterious onahole that allows him to have actual sex with whatever girl he imagines. Making full use of his new tool, he begins a plan to take revenge by impregnating the entire class.

The kind-spirited Muramata holds a secret that no one at her workplace knows. Following yet another mistake made by her subordinate Kaji, the two head off from work to spend a stress-free night out drinking. Due to their usual lounge being closed for the night, at Muramata's suggestion, the office pair head over to her apartment…

Takashi's older sister is an older woman who has a hidden perverted side, when she visits her younger brother Takashi who decided to live alone due to the constant harassment of his sister, she notices how messy her room is and there where she finds a porn dvd that deals with anal sex, that's when she starts to get excited until her brother discovers her….

Our hero is on a quest to "defeat" the Demon King... but it turns out... its a demon... queen?

Japan was engulfed in a demographic crisis, forcing the government to implement the "Ikumonogakari" law, which permitted promiscuous sexual interactions among the people. They started doing practical and pedagogical activities on the lessons of sexual life and a partner's sexual fulfillment. The protagonists are young and inexperienced, so practical exercises will help them to improve their skills.