On the night of his favorite game's shutdown, Akira Oono awakens in the body of his online character: Demon Lord Hakuto Kunai.

Oono Akira, a working adult that can be found anywhere, was transported to a different world while logged into a character known as the "Demon Lord" in a game he manages. There, he meets a girl with a disabled leg and they begin to travel together, but there's no way that others will leave a "demon lord" with such overwhelming strengths alone. While being targeted by countries and saints that are trying to subdue the demon lord, they cause turmoil wherever they go. Demon lord on the outside, normal person on the inside, a misunderstanding type fantasy.

Akira Oono finds himself in the world of Infinity Game as the last boss and his favorite character, the Demon Lord Hakuto Kunai. After meeting Aku, Luna, and other friends along the way, the Demon Lord begins a new journey to find a spell that can take him back to the real world. The story of the Demon Lord continues in this next chapter!.—Crunchyroll