Kyousuke is tired after the events at Akihabara, and Manami suggests calling off their study session. Kyousuke asks her if she feels like going somewhere special, but as we could expect, our extremely normal Manami wants to go to… the local park – she doesn’t mind where, as long as Kyousuke is with her.
At the park, they see some people doing a photo shoot – one of the models being none other than Kirino. Kyousuke learns from Manami that Kirino ranked among the best students in the whole prefecture. At home, his mother is radiant because she’s heard that Kirino is the ace of the track and field club.
Just… just how awesome is Kirino? Since they didn’t have a single conversation in years, he never knew about all of this. Meanwhile, Kyousuke completes his first eroge with a laptop that he borrowed from Kirino, since he didn’t feel really comfortable watching a loli imouto eroge hentai scene with his sister next to him.
One day Kyousuke gets home and there’s a dead silence in the living room. Kirino and his father are sitting there. His mother stops Kyousuke from coming in. From what his mother tells him, his father found one of Kirino’s anime DVDs, probably in a similar situation to Kyousuke’s some time ago. Kirino rushes out of the house, crying. Kyousuke’s father is determined to search Kirino’s room for more otaku material, but Kyousuke block his way. He finally manages to persuade his father to at least let him talk to Kirino; but in exchange, his father tells Kyousuke to take responsibility and throw Kirino’s stuff away. Kyousuke accepts.
By Chikuson
Having gained some time, Kyousuke rushes to find Kirino. She is in a video arcade and Kyousuke tries asking her if she couldn’t just give that hobby up. Crying, Kirino says she can’t. It’s become part of her, and this is something she won’t give up. Moved, Kyousuke returns home and tries to persuade his father. His father argues that otaku stuff is a bad influence. Kyousuke points out that he doesn’t know anything about it, and he admits he doesn’t, but he insists it’s a bad influence. Kyousuke also tells him that, if it was such a bad influence, why would Kirino keep getting top grades, while having a job and being in the track and field club?
His father is, however, unimpressed. Kyousuke shows him then several family albums. Then, another album, which his mother gave to him and which is his father’s precious photo album – Kirino’s debut as a model. Wasn’t he proud of all Kirino accomplished? (Even if his father insists he only wanted to see pictures of Kirino as a model to check whether it was a proper job or not)
And now, Kyousuke produces a picture that Kirino took that very evening: Saori and Kuroneko, together with a smiling Kirino. Being an otaku, Kyousuke argues, is also part of Kirino. Kirino is all of that – the model, the honor student, the athlete, and the otaku. If his father denies Kirino’s otakuness, he’s denying Kirino herself.
This time, his father is moved, and admits he didn’t know, in fact, anything about otakus except for the prejudices in the media. He won’t throw away Kirino’s collection, except for… any porn. This is not about whether it’s bad for her or not anymore, but about the fact that it is illegal for minors to own that stuff. But most of Kirino’s stuff is actually pornographic in nature, so this won’t do either, Kyousuke thinks. But he has no arguments to counter his father’s argument… except…
“That porn was actually mine”
His father is dumbfounded.
“And mom even knows about my porn mags. So there’s nothing wrong then, is there?”
His father gets really angry but just retorts “Do whatever you want, I don’t care anymore” and leaves.
Thus, Kirino’s otaku stuff was saved. Unprecedentedly, she actually thanks Kyousuke, and warns him. “I will still need some counseling”

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…nice
master please summarize the other chapters as well please I want to know what happened next..I really love Ore no Imouto when you blog the spoilers of chapter 4-6 I was really really happy..thnx God bless you
Thanks for this. I’d read the manga but they don’t scanlate fast enough, LOL.