The final Heavenly King is none other than Mephilas, who targets what Mirai loves most, his friends! Sure enough, Mirai finds himself in a world where Mephilas is the protector of Earth and Mebius is the enemy, turning even GUYS against him. Meanwhile, the original Ultraman watches his old enemy's every move. Will Ultraman let Mirai die at the hands of his cherished friends? (Source: TV Tropes)