EroManga-Sensei: I'll Seduce You With Food

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 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! (Source: Dark Horse)

The story revolves around Masamune Izumi, a light novel author in high school. Masamune's little sister is Sagiri, a shut-in girl who hasn't left her room for an entire year. She even forces her brother to make and bring her meals when she stomps the floor. Masamune wants his sister to leave her room, because the two of them are each other's only family. Masamune's novel illustrator, penname “Ero Manga Sensei,” draws extremely perverted drawings, and is very reliable. Masamune had never met his illustrator, and figured he was just a disgusting, perverted otaku. However, the truth is revealed … that his “Ero Manga Sensei” is his own younger sister! To add to the chaos that erupts between the siblings, a beautiful, female, best-selling shoujo manga creator becomes their rival! (Source: Anime News Network)