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

Izayoi Sakamaki, Asuka Kudou, and You Kasukabe are extraordinary teenagers who are blessed with psychic powers but completely fed up with their disproportionately mundane lives—until, unexpectedly, each of them receives a strange envelope containing an invitation to a mysterious place known as Little Garden. Inexplicably dropped into a vast new world, the trio is greeted by Kurousagi, who explains that they have been given a once-in-a-lifetime chance to participate in special high-stakes games...