Takashi Toono was unsure what to expect when he transferred to Morimori Academy, a private all-boys boarding school located deep in the mountains. However, it's no different from any other boys' school, and since he entered halfway through the year, he feels like an outcast—until the bright and friendly Kyousuke Yaguchi introduces himself. Due to the school's compulsory club policy, Toono chooses to join the low-effort "Photography Club," but the club is not what it seems. Nicknamed the "Yarichin Bitch Club," its members offer sexual services to pent-up boys at the academy—for no reason other than a love of sex. What's worse is his monthly sex quota—and the punishment for failure is severe: the club will forcefully take his innocence. However, as time runs out, Toono is left mortified and out of options. At Toono's side throughout his ordeal is Yaguchi, as well as Yuu Kashima—a fellow transfer student and club member who shares Toono's predicament. While the first years in the club struggle with their sticky dilemma, the club collectively has to deal with sex, secrets, and even stalkers! [Written by MAL Rewrite]

After a year in America, Kurisu Makise returns to Akihabara and reunites with Rintarou Okabe. However, their reunion is cut short when Okabe begins to experience recurring flashes of other timelines as the consequences of his time traveling start to manifest. These side effects eventually culminate in Okabe suddenly vanishing from the world, and only the startled Kurisu has any memory of his existence. In the midst of despair, Kurisu is faced with a truly arduous choice that will test both her duty as a scientist and her loyalty as a friend: follow Okabe's advice and stay away from traveling through time to avoid the potential consequences it may have on the world lines, or ignore it to rescue the person that she cherishes most. Regardless of her decision, the path she chooses is one that will affect the past, the present, and the future. [Written by MAL Rewrite]

Valkyrie, Kazuto, Akina, Hydra, and friends are back for more when the Key of time suddenly appears along with many other mysterious happenings. All seemed to be linked to a person named "Valkyrie Ghost" whose only goal is stealing Kazuto for herself. As they team up against this seeming unbeatable foe they dig deeper into the mysterious past of Valkyrie's home planet, Valhalla. (Source: ANN)

Unaired episode included in the seventh Blu-ray and DVD volumes. Haruka is busy working at the agency so she can't help the idols with the preparations for the Christmas Party held by Shining Agency. A lot of memories and information are revealed while Starish is preparing for the party.