Oreimo

One morning, Kyosuke is surprised to find Kirino behaving politely to him. That evening, while Kyosuke worries about whether she is forcing an act in front of everyone, Kirino uses her final life counseling session to ask Kyosuke to buy her an eroge that is launching at midnight in Akihabara. As Kyosuke gets in line, he runs into his classmate, Kōhei Akagi, who is buying a yaoi eroge for his own sister. Kyousuke, after realizing that the trains are no longer running, manages to convince one of the other customers to lend him his bike so he can ride back home. After Kyosuke gets back home with the game, Kirino asks him to play with her. She then shows him all of the medals and report cards with bad grades she had received throughout the years. The next morning, Kyosuke learns that Kirino has left home for America for track and field training. In the beginning of the new school term, Kyosuke meets up with Kuroneko, who would be attending his school as his underclassman.

Kuroneko (real name: Ruri Gokou) enrolls in Kyousuke's school, and Saori feels downhearted that she hasn't heard from Kirino. Kyousuke notices that Ruri is having trouble making friends due to her personality, so he decides they should try a membership at their school's Games Research club where the boy meets two other persons he never expected to be there as well.

With Sena and Kuroneko constantly quarreling in the Games Development club, the club president decides they'll have to write a game together and submit it to an online contest. Both girls have different concepts about the game's theme, so they'll both present them to the club whose members will then decide by majority vote whose concept will have to be implemented. And Kyousuke, with no programming skills thus acting as supervisor for the team, suggests to write an eroge—in order to have less competition and a better chance to win the contest.

For years, ordinary high-schooler Kousaka Kyousuke has had an icy relationship with his younger sister Kirino, a star athlete who is also a star student.

While being grilled by Kirino over why he hasn't made any progress in the game she ordered him to complete, it occurs to Kyousuke that she needs some friends that she can talk to without concealing her otaku interests.

Kirino finds her first otaku friends at the IRL meet: "Kuroneko" and "Saori Bajeena." They spend their days deep in discussions over their otaku interests. Seeing Kirino this way puts Kyousuke's mind at ease.

As Kirino organisings thing with school and friends following her return from America. Kyosuke grows concerned that she might start ignoring him again due to the way he forced her to come back, as well as struggling to find the meaning behind the kiss Ruri gave him when he went to retrieve her. Later, Kirino once again calls upon Kyosuke for life consultation, having him take her to Akihabara to watch a trailer for the next Meruru season before engaging in a long-missed shopping expidition she spent the entire night planning. As thanks for his help, and to celebrate a year of life consultation, Kirino gives one of her eroge purchases to Kyosuke to play.

Feeling frustrated that Kirino is ignoring her in favour of a popular mobile game called Love Touch that lets you exchange texts with virtual girls, Ayase asks Kyosuke to do something about it. After Kyosuke brings it up to Kirino, she gives him Love Touch to avoid being tempted by it, only for Kyosuke to end up becoming addicted himself. As Ayase becomes angered upon learning of this from Manami, Kyosuke attempts to explain how the game's heroine is similar to Ayase. He suggests imitating the heroine to better hold Kirino's interest, but this is soon met with violent backlash from Ayase when dubious phrases are brought up. After Ayase goes to Manami for advice, Kyosuke is shown the error of his ways when Ayase decides to imitate the game's yandere route in front of Kirino.

As Kyosuke, Kirino and Ruri decide to visit Saori's apartment as a surprise for her birthday, they finally see what she looks like without glasses. Four years ago, Saori was a weak bodied girl who was shy about showing her face to others. One evening, she was brought by her older sister, Kaori, to a special apartment where she indulges in otaku activites alongside her flatmates, Shinya Sanada and a budding manga artist named Kanata Yamanashi. Kanata took an instant liking towards Saori and soon taught her about the otaku lifestyle. However, the circle soon starts to dwindle after Kaori left to get married, leaving Saori alone once more. Feeling betrayed by Kaori, Saori became determined to start her own circle and help others like she helped her, receiving her trademark swirly glasses from Kanata to help her on her way. This would eventually lead to the start of her otaku life and her meeting with Kirino and Ruri.