Question: what is high school dxd season 2 called?
Answer: A second season called High School DxD New (ハイスクールD×D NEW, Haisukūru Dī Dī Nyū) aired from July 7, 2013, to September 22, 2013. A third season called High School DxD BorN (ハイスクールD×D BorN, Haisukūru Dī Dī Bōn) aired from April 4, 2015 to June 20, 2015.