On May 1, 1945 in Berlin, as the Red Army raises the Soviet flag over the Reichskanzlei, a group of Nazi officers conduct a ritual. For them, the slaughter in the city is nothing but the perfect ritual sacrifice in order to bring back the Order of the 13 Lances, a group of supermen whose coming would bring the world's destruction. Years later, no one knows if this group of officers succeeded, or whether they lived or died. Few know of their existence, and even those who knew began to pass away as the decades passed. Now in December in the present day in Suwahara City, Ren Fujii spends his days at the hospital. Every night he sees the same dream: A guillotine. Murderers who hunt people, and the black clothed knights who pursue the murderers. He is desperate to return to his normal, everyday life, but even now he hears his friend Shirō's words: "Everyone who remains in this city eventually loses their minds."
Kyotaro Kakei has always had an affinity towards books in hopes to find answers to his life. With a mentor's promise, he continues to search for a book with his absolute hope. However, this changes when he receives a foretelling message saying that "Today, something will happen that will change your fate. --From the Shepherd." Due to this premonition, his normal school life at Shiomoi Academy becomes entangled due to the optimistic Tsugumi Shirasaki and the Shimoi Happy Project.
Kaori Sasaki—a member of Uchihama Academy's Astronomy Club—confesses to Sou Akiyama, but later that evening, she dies in a tragic road accident. Her friends and fellow club members mourn her death in a local hospital. Yet she shows up to school the following day, and no one senses anything amiss. The day finishes without any unusual incidents, and the group of friends plans for the upcoming cultural festival. Suddenly, the room is shaken by an unnatural earthquake. Everyone splits up to investigate—except for Nagisa Hanamiya, who stays behind. As everyone leaves, Nagisa notices that the odd relic-like cube that she was toying with starts emitting a strange blue light. Meanwhile, Sou stumbles upon an unconscious, naked girl lying in a pool of water.
Horses dashing gallantly... Knights challenging their own limits... Magnificent, heroic battles highlight the horseback lance sport of jousting. One of the many people fascinated by this proud sport, Takahiro Mizuno, acts as a begleiter (an assistant) to jousting knights as he lives his rather tedious life at Winford Academy.
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?
Girls from all over the world gather at IS Academy to learn how to become IS pilots. However, since Ichika can somehow pilot the IS even though he is male, he was forced to attend IS Academy as the only male in this school.
Moriyama plays a temp worker who has never had any luck with women. One day, he suddenly starts getting invitations from several beautiful women, and he finds himself confused about how to deal with this new experience of having a "moteki" (a period when one is very popular and attractive to others).
Kei Mizusawa is a Japanese voice actress affiliated with Yellow Tail. Her former stagename was Madoka Horiike. She uses the alias Rino Kawashima for adult video games and anime.