How NOT to Summon a Demon Lord

Isekai Maō to Shōkan Shōjo no Dorei Majutsu (異世界魔王と召喚少女の奴隷魔術) is a Japanese light novel series written by Yukiya Murasaki and illustrated by Takahiro Tsurusaki. The light novels are published in English by J-Novel Club.

A manga adaptation by Naoto Fukuda has been running since 2015 and is licensed by Seven Seas Entertainment.

An anime television series adaptation by Ajia-do Animation Works will premiere on July 5, 2018.

Plot
Takuma Sakamoto is an ordinary human who is mysteriously transported to the world of his favourite MMORPG, Cross Reverie, with the appearance of his own character in the game, the Demon Lord Diablo. The two young girls who summoned him, the pantherian Rem and the elf Shera, attempt to use a spell to make Takuma their servant, but the spell rebounds, and both end up with magic collars stuck on their necks, thus becoming his slaves instead. With a serious case of social anxiety, Takuma decides to act like his character while interacting with others, and makes use of his high stats and vast knowledge of Cross Reverie's lore to survive in his new environment, traveling along with Rem and Shera to look for a way to remove their slave collars while helping them with their own, personal issues that led them to summon him in the first place.

Manga

 * Main article: Isekai Maō to Shōkan Shōjo no Dorei Majutsu (Manga)

Light Novel

 * Main article: List of Light Novel Volumes

The light novels are written by Yukiya Murasaki and illustrated by Takahiro Tsurusaki. Kodansha published the first volume under their Lanove Bunko imprint in December 2014. J-Novel Club announced their license to the series on September 28, 2017.

Anime

 * Main article: Anime

The series will premiere on July 5, 2018, and will be broadcast on AT-X, BS Fuji, Tokyo MX, and Sun TV. Crunchyroll will simulcast the series worldwide outside of Asia, and Funimation will simuldub it. The series' opening theme, "DeCIDE", will be performed by the unit SUMMONARS 2+, a group composed of voice actresses Azumi Waki, Yū Serizawa, Yumi Hara, Rumi Okubo, and Emiri Katō, and the ending theme, "Saiaku no Hi demo Anata ga Suki." (最悪な日でもあなたが好き., "I Like You Even on the Worst Day."), will be performed by Serizawa and produced by HoneyWorks.

App Games

 * Main article: Isekai Maō to Shōkan Shōjo no Dorei Majutsu: X Reverie

Reception
The light novels had over 1 million copies in print as of March 2018.