Writing light novels isn't all that easy, especially when you're in high school&and you have to do the cooking and the chores for your shut-in... more>> stepsister who's hardly come out of her room the past year! In the light novel business, it's crucial to have the right person illustrating your books to help them sell--and maybe get made into manga and anime! But in a world of online pen names, the author and the illustrator may still not even know each other . . . until one day they realize they've been living in the same house all along! Now the home life of confident writer Masamune Izumi and his reclusive sister Sagiri--aka the artist ''Eromanga Sensei''--will be a drama to compare with their rising careers, their restive fan base, and their rivals in the industry! <<less

Kyosuke Kosaka, a normal seventeen-year-old high-school student, hasn't gotten along with his younger sister, Kirino, in years. For longer than he can remember, Kirino has... more>> ignored his comings and goings and looked at him with spurning eyes. It seemed as if the relationship between Kyosuke and his sister, now fourteen, would continue this way forever. One day, however, Kyosuke finds a DVD case of a magical girl anime entitled Hoshikuzu Witch Meruru (Stardust Witch Meruru), which had fallen into the entranceway of his house. To Kyosuke's surprise, inside the case, an adult video game entitled Imoto to Koishi yo! (Love with Little Sister!) is hidden. <<less

This is the Ayase route of the Oreimo storyline.

Manga adaptation based on Kuroneko's story, which starts in the 5th light novel.

The Official 4koma Anthology Dengeki Comics EX

Chiaki is handsome, academically gifted, athletic, and born into a wealthy family with a beautiful sister. Despite his seemingly perfect life, he faces a persistent problem: he's never been lucky in love and struggles to capture the attention of girls. Determined to turn things around in high school, he wakes up one morning to a surprising transformation—he has turned into a girl!... more>>

He is shocked to find out that he has lost the appearance he was so proud of, but when he looks in the mirror, he sees a very cute girl in the reflection. He immediately goes to show it off to his twin sister Kaede, who happens to be very popular with the girls, but there is also something very strange happening to her...

(Source: Kadokawa, translated) <<less