Maybe a frerard where Gerard and Frank both run away from home and meet on a train,while they're on the train they decide to stick together and then they start to get feelings for each other and it eventually turns into a frerard.
Sorry, I know it's cheesy and not very detailed but its the best I could come up with :)
Author's response
Actually, this is a really god idea :) Thanks, i'm so gonna write it :)
LatherTheBlood xo