Spin-off of the anime and based on the novel.

Sakamaki Izayoi, Kudou Asuka, and Kasukabe You have tremendous psychic powers and are bored with the regular world. An envelope arrives for each person, and when each opens their envelope, they are stunned to see the scenery around them change to a world they had never encountered before. They've been summoned by the Black Rabbit to help the community "No Name" to overthrow the Demon lords.