Kirino Kousaka embodies the ideal student with equally entrancing looks. Her grades are near perfect, and to cover her personal expenses, she works as a professional model alongside her best friend Ayase Aragaki, who abhors liars and all things otaku. But what Ayase doesn't know is that Kirino harbors a deep, entrenched secret that will soon be brought to light. At home one day, Kyousuke, Kirino's perfectly average brother, stumbles upon an erotic game that belongs to none other than his seemingly flawless little sister. With her reputation at stake, Kirino places a gag order on her sibling while simultaneously introducing him to the world of eroge and anime. Through Kirino, Kyousuke encounters the gothic lolita Ruri Gokou and the bespectacled otaku Saori Makishima, thus jump-starting an entirely new lifestyle. But as he becomes more and more involved in his little sister's secret life, it becomes that much harder to keep under wraps.

The true end arc of Ore no Imouto. These four episodes branch out after the 11th episode of the main TV series and present an alternative version to the end of the TV series. These episodes contrast with the good end arc of the TV series, which was an original ending written for the anime, and instead closely follows the original story from the light novels.

Serial murders have recently plagued Inaba, with the police struggling to find any leads. Despite this, due to his parents going abroad for work, Yuu Narukami moves to the small town to live with his uncle for a year. He enrolls at Yasogami High School, where he meets and befriends Yousuke Hanamura, Chie Satonaka, and Yukiko Amagi. While hanging out together after school, the group fills Yuu in on the urban legend known as the Midnight Channel—a mysterious TV channel that only appears at midnight on rainy days while the viewer is alone. Curious about the claim, Yuu decides to tune in that night, only to see the next victim of the serial murders appear on the screen instead. He also finds himself being drawn into the TV, which intrigues his newfound friends enough to want to investigate. Yuu ends up falling into the world within the TV, which is blanketed by a thick fog and swarming with hostile creatures known as Shadows. Realizing that this world is somehow connected to the murders, the Investigation Team forms with the goal of uncovering the mystery behind the incidents.

Himeji Wakaba is a 5th year elementary school student, and she has the ability to see things that others can't. They are mostly frightening evil spirits, and they tend to do bad things to people who are close to her. As a result, Wakaba has no friends and rarely smiles. On a couple of occasions, she brings home stray animals, but her parents won't let her keep them. However, they're worried about their sad, creepy daughter, so one day they decide that whatever Wakaba brings home next, they'll let her keep. The next thing she brings home is a pink monster called Pupipo, but her parents stand by their decision and let her keep it. No one is quite sure what Pupipo is, but it protects Wakaba from the other things she sees. Pupipo also helps Wakaba make friends with an occult-obsessed transfer student and solve problems with bullying. Wakaba's life is a much better place with her pet pink monster! (Source: MangaHelpers)