Summary by cleofe maliga
Kyosuke Kosaka and Kirino Kosaka are siblings who never got along well. Now that Kyosuke is seventeen and a high school student, his middle schooler sister still disregarded his weaknesses and views him with scorning eyes. No one knows if they would ever got along or this will continue for all eternity. But one day Kyosuke found something in the house that made Kirino openly pay attention to him especially with his girl escapades. It’s a DVD of an eroge that happens to be owned by Kirino. He discovers that Kirino has actually a brother complex and that she is an otaku with extensive collection of moe anime and eroge, that she funded her hobbies herself by being a model. Follow Kyosuke and Kirino as they started to get closer and support each other like what siblings would do.
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