Origin
Japan
Nene Todoroki is a first year (later second year) student and the head of the Robot Research Club at Ousai. Suzu Hagimura considers her best friend, despite the fact Nene is extremely perverted even compared to the already perverted Shino Amakusa and Aria Shichijō. Unlike the two members of the School Council, Nene demonstrates her perverted nature by her interest in machines, specifically dildos and vibrators and the like. She often wears one, even in school. She also has a tendency to forget to switch them off and is not shy at letting people (most often Suzu or Takatoshi Tsuda) know about it.

Seitokai Yakuindomo
On his first day of high school at the formerly all-girl's Ousai Private Academy, Takatoshi Tsuda is called out for his untidy uniform by the student council president Shino Amakusa. In apology for delaying Takatoshi for his first class—and stating that the group needs a male point of view to accommodate the arrival of boys at the school—Shino offers him the position of vice president of the student council. Though unwilling, Takatoshi finds himself appointed as the newest member of the student council having yet to even step foot inside the school building. Takatoshi soon realizes that the other student council members who are more than a little strange: President Shino, who is studious and serious in appearance, but actually a huge pervert, fascinated with the erotic and constantly making lewd jokes; the secretary Aria Shichijou, who may seem like a typical sheltered rich girl, but is just as risque as the president, if not more so; and finally, the treasurer Suzu Hagimura, who may act fairly normal, but has the body of an elementary school student and is extremely self-conscious of it. Surrounded by these colorful characters, the new vice president must now work through a nonstop assault of sexual humor and insanity.