The True Crimson King

Mikoto Gremory is the second oldest brother of Rias Gremory; being only 10 minutes older than her, he should have been the rightful heir. But their father had other plans and instead named Rias the heir to the Gremory family. While jealous at first, Mikoto soon discovered that it was better this way. While Rias dealt with all the problems of being heir, Mikoto was building his strength, training, and unlocking power, his own power that would make him strong enough to rival God.