HighSchool DxD: DxDown-Under

Sequel to canon: Rias takes an opportunity to travel to the island continent of Australia in order to investigate its backstreets and bask in the summer sun. As they delve into the clues left behind, an old enemy seeks revenge... Is there more to the creation of the Infinte Dragon God Ophis, hidden in the ancient Youkai ruins? CanonIssei/Characters!