Description:

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. Masamune's novel illustrator, pen name "Eromanga", 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 "Eromanga-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: ANN)

Description:

Neiko Futaba is the school idol, but little does everyone at school what's she's really like. Only her beloved younger twin brother Otohiro knows her overly clingy persona, much to his dismay. On top of that, it seems Neiko seems to be rather determined to seduce her brother in every way possible. Unfortunately (or fortunately) for Otohiro, it is just an everyday occurrence in the Futaba household... (Source: Baka-Updates)

Description:

The manga revolves Rikuto Mitani after his entrance exams into high school. Rikuto's father just remarried and Rikuto now lives with his "step brother" that appeared to be very feminine and goes to school in a female uniform!