Endride

When a crystal warps Shun Asanaga into a world deep beneath Earth's surface, he confronts the moody Prince Emilio who is hellbent on killing the king. Just when the two seem perfectly at odds, Shun discovers an incredible power and winds up on a dangerous journey with a ragtag team of rebels. Seeking a portal between worlds, will the prince finally get his revenge, and will Shun find a way home? (FUNimation)