The year is 2205. The "historical revisionists" have begun attacks on the past in their plot to change history. The Saniwa, who have been charged with protecting history, can imbue life into objects. Strongest among these are the Tōken Danshi. The story centers around their cheerful lives.
When boys suddenly get into places where they've never been allowed before, some girls tend to get upset. So when the decision is made to merge the elite Yuihime Girls' Private Academy and the coeducational Kagamidai Private Academy, everyone wants to take extra care in avoiding trouble while bringing the two Privates together. Therefore, rather than just bringing the Kagamidai boys into the Yuihime girls' school all at once, a plan is concocted in which a group of test males will be inserted into the Girls' Private Academy first.
Thus, poor young Shingo finds himself being thrown as a sacrificial lamb to the lionesses of Yuihime, who aren't exactly waiting for him with open arms. Will Shingo manage to survive the estrogen soaked death pit that is Yuihime? Can the girls learn to be more receptive to the boys? And just how long until something involving panties will cause emotions to flare, sparks to fly and the battle of the sexes to explode?
Haruka, a girl who suffers during her childhood due to her ability to read people's mind, is starting her high-school life in a new school. When she transferred in, she feels that her life will be the same as ever, but then she meets Manabe, a guy who always think about erotic things, and a club consisting of people who aren't afraid of her ability. With Manabe and her clubmates around, her gloomy life slowly start to bloom and enjoyable.
Dusk Maiden of Amnesia revolves around a first-year high school student, Teiichi Niiya who had just enrolled at Seikyou Private Academy. One day while wandering the hallowed halls, he gets lost in one of the school's old buildings and encounters Yuuko Kanoe, who reveals herself as a ghost with no memories. While investigating her death by looking through the school's seven mysteries, they discover the truth about these ghost stories and help those who are troubled…
Everyone in the world uses smartphone apps. But inside them lurks unknown creatures called "Appli Monsters," or "Appmon." The Appmon are AI lifeforms with the ability to think and act, and exist in the boundary between the human world and digital space. In the vast sea of the internet, the "last boss AI" Leviathan takes control of the Appmon with a virus and begins hacking every system, thus starting to control the human world from the world of the net. Haru Shinkai is led to acquire the Appli Drive, and uses it to materialize Gatchmon, a search app monster.