Eromanga-sensei

Masamune Izumi writes light novels while trying to support the only family he has left: his younger stepsister Sagiri, who has shut herself inside her room since their parents died and barely speaks to him face to face. His professional life contains another mystery. The provocative illustrations in his books come from an artist known only as Eromanga-sensei, whom Masamune has never met.

An accidental online broadcast reveals that the mysterious illustrator is Sagiri herself. The siblings suddenly discover they have been collaborating for months without knowing it, giving them a strange new way to communicate. As rival authors, deadlines, and publishing ambitions crowd into their lives, Masamune wants to succeed as a novelist while helping Sagiri slowly reconnect with a world larger than the bedroom door between them.