I am trying to find a manga I read a few years ago. My memory is a bit fuzzy on the more specific details (which is why I'm having trouble finding it). The story starts of with a guy being pulled into a parallel world with demons and his brother is like abducted and becomes powerful? then it flashes forward like 20 years and focuses on a different guy who is trying to get revenge against the king, who is also the guy who got brought into the parallel world.. if anyone can give me the name of the manga based on those details it would be very much appreciated.

Uh, is it Immortal Regis and Cavalier of the Abyss?