In another dimension.

Toad Skywalker is a pawn of Rias Gremory's peerage and the red dragon emperor, not to mention Rias Gremory's boyfriend. Despite his love for her, he still won the hearts of every other girl in kuoh and the underworld. After their battle against Loki, Rias a her peerage were transported to another dimension where aliens exist and transferred to a school called Sainan academy and met a very unimpressive guy named Rito Yuuki who apparently have girls swarming all over him too but as soon as they met Toad, their affections changed towards him instead of Rito.