The four staff members and Drive are also involved in the anime adaptation of the Konosuba: An Explosion on This Wonderful World! spin-off, which was announced at the same livestream event. Reprising their roles are Jun Fukushima as Kazuya, Sora Amamiya as Aqua, Rie Takahashi as Megumin, and Ai Kayano as Darkness.

The isekai comedy light novels written by Natsume Akatsuki and illustrated by Kurone Mishima ran from 2013 to 2020 with 17 main volumes and two short story anthologies. It is published under the Kadokawa Sneaker Bunko label. 

Yen Press describes KonoSuba as:

Game loving shut-in Kazuma Sato’s life as a young schoolboy in Japan abruptly comes to an early end…or at least it was supposed to. When he opens his eyes, though, he sees a beautiful goddess that offers him a once in an after-lifetime chance to be reborn in a parallel world. The catch is that the world is violent and threatened by a growing evil! Fortunately, he can choose any one thing to bring with him. So he chooses the goddess, Aqua! And so his adventure with his gorgeous companion begins–if he could just get enough money and food to survive, keep his goddess out of trouble, and avoid grabbing the attention of the Demon King’s army!

The light novels have inspired a manga adaptation by Masahito Watari and several spin-offs, while the anime led to the release of several KonoSuba video games. The story began as a web novel on Shousetsuka ni Narou in 2012.

Source: KADOKAWAanime YouTube channel