How Not to Summon a Demon Lord is a Japanese light novel series by Yukiya Murasaki
It was adapted into a manga and an anime
The story follows Takuma Sakamoto, a gamer who is transported into the world of his favorite MMORPG
In the game world, he appears as his powerful character Diablo
Two girls, Rem and Shera, accidentally summon him and become his servants due to a spell mishap
The series combines fantasy, comedy, action, and harem elements
The anime first aired in 2018
A second anime season aired in 2021
The original Japanese title is Isekai Maou to Shoukan Shoujo no Dorei Majutsu
It is also commonly known as How Not to Summon a Demon Lord