Problem Children Are Coming From Another World, Aren't They?

Synopsis

Sakamaki Izayoi, Kudou Asuka, and Kasukabe Yō have tremendous 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 Kuro Usagi to help the community "No Name" to overthrow the Demon lords.