High School DXD X Kamen Rider Ryuki: The Data Time

Tyler Klause, was just an ordinary high school kid at Kuoh Academy who was always kind, obedient, and loves helping evreyone who needed help. Evreyone knows that Tyler was the best person they can trust and a good friend they can count on. However, there was a beautiful girl with black hair who appear to be a fallen angel. To protect this World Tyler has to fight the Fallen Angel, and to do that, He transformed .......into The Dark Dragon Warrior.... Kamen Rider Ryuga.