The story centers around high school student Masamune Izumi who loves writing light novels. Having no artistic skill himself, Masamune always gets his novels illustrated by an anonymous partner using the pen name "Eromanga Sensei", who is known for drawing questionably perverted images despite being extremely reliable. In addition to balancing his passion and school, Masamune is also stuck with taking care of his only family member—his younger step-sister Sagiri Izumi. A hikikomori by nature, Sagiri shut herself in her room for over a year and constantly bosses Masamune around despite his attempts to get her to leave her room. However, when Masamune inadvertently discovers that his anonymous partner has been Sagiri all along, their sibling relationship quickly leaps to new levels of excitement, especially when a beautiful, female, best-selling shōjomanga author enters the fray.
The light novels are written by Tsukasa Fushimi and illustrated by Hiro Kanzaki. The series is published by ASCII Media Works under their Dengeki Bunko imprint, and the first volume was released on December 10, 2013. Twelve volumes have been released as of November 2019.
Manga
A manga adaptation illustrated by Rin began serialization in ASCII Media Works' Dengeki Daioh magazine on May 27, 2014. The manga has been compiled into ten tankōbon volumes since November 10, 2014. Dark Horse Comics licensed the series in North America. In July 2020, the manga became one of seven titles to be removed from Books Kinokuniya in Australia for claims of promoting child pornography. A spin off manga focusing on the character Elf Yamada began serialization in the September issue of Dengeki Daioh on July 27, 2018.
Anime
An anime television series adaptation is directed by Ryohei Takeshita, written by Tatsuya Takahashi, and produced by Shinichiro Kashiwada and Aniplex, featuring animation by the studio A-1 Pictures. The anime aired from April 9 to June 25, 2017. Two original video animation episodes were scheduled to be released in 2018 but were pushed back to January 16, 2019. The opening theme is "Hitorigoto" by ClariS, and the ending theme is "Adrenaline!!!" by TrySail, with episode 8 featuring "Natsuiro Koi Hanabi" by Akane Fujita. Aniplex of America has licensed the series in North America.
