The official website for the television anime of Yukiya Murasaki's How NOT to Summon a Demon Lord light novel series posted a teaser promotional video and the second teaser visual (of Diablo, Shera, and Rem) on Wednesday. The video reveals the anime's staff and the summer premiere.

Yūta Murano (Brave Beats, Dream Festival!) is directing the anime at Ajiado. Kazuyuki Fudeyasu is in charge of the series scripts. Shizue Kaneko is designing the characters. Yuki Nishioka is serving as chief animation director. Yuki Miyamoto is serving as monster designer and action animation director.

Natsuko Otsuka is the color key artist, and Kusanagi is handling the backgrounds. Teppei Satō is directing the photography at Asahi Production Shiraishi Studio. Satoshi Motoyama is directing the sound at Half H·P Studio.

J-Novel Club is releasing the novel series in English, and it describes the story:

In the MMORPG Cross Reverie, Takuma Sakamoto is so powerful that he is lauded as the “Demon Lord” by other players. One day, he is summoned to another world – but with the same appearance he had in the game! There, he meets two girls who both proclaim themselves to be his Summoner. They had performed an Enslavement Ritual to turn him into their Summon... but that's when Takuma's passive ability "Magic Reflection" activated! Instead, it was the girls who had become enslaved! Though Takuma may have been the strongest Sorcerer there was, he had no idea how to talk with other people. That's when he makes his choice: to act based on his persona from the game! “Amazing? But of course... I am Diablo, the being known and feared as the Demon Lord!” So begins a tale of adventure with an earth-shakingly powerful Demon Lord (or at least someone who acts like one) taking on another world!

Kodansha published the first novel with illustrations by Takahiro Tsurusaki in December 2014 and the ninth volume in January. J-Novel Club released the first novel as an e-book last December and second volume in February. Naoto Fukuda launched the manga adaptation on Kodansha's Suiyōbi no Sirius (Wednesday Sirius) section on the Niconico service in June 2015, and Seven Seas Entertainment announced last September that it has licensed the manga.

Kamelie launched a manga adaptation of Murasaki's 14-Sai to Illustrator light novel series last November in Cygames' Cycomi app.

Source: Animate Times via Ota-Suke