The "new sibling romantic comedy" 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.<br>
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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!<br>
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(Source: Anime News Network)

Episode 1 - My Little Sister, and the Sealed Room

Episode 2 - Class Rep with a Normie Life, and a Fearless Fairy

Episode 3 - Buck Naked Mansion and the Fallen Master

Episode 4 - Eromanga Sensei

Episode 5 - Let's Plan a Light-novel with your Little Sister

Episode 6 - Masamune Izumi and the Nemesis of Ten Million Copies

Episode 7 - Little Sister and the Most Interesting Novel in the World

Episode 8 - Dreaming Sagiri and Summer Fireworks

Episode 9 - Little Sister and the Fairy Island

Episode 10 - Masamune Izumi and the Younger Senpai

Episode 11 - How the Two Met and Future Siblings

Episode 12 - Eromanga Festival

A-1 Pictures

Aniplex

KADOKAWA

ASCII Media Works

Kinoshita Group

Movic

BS11