Red Ranger D×D [Power Rangers X High School DxD]

After the legendary Red Ranger named, Seth Lennon, and his fellow Dino Rangers helped the Grid Battleforce to fight against Goldar Maximus, they went back to their home and live a normal life once again. One day, Seth was walking alone for his journey through another worlds that has never seen before. Then, he discovered an abandoned church and found a strange crimson magical circle on the floor. When Seth takes a step on it, he went into the world where devils, angels, and other species exists. But the weird thing is when he entered this world, Seth reverted back to his teenage, except he still got the powers within him. What adventures that he will discover?