User blog comment:Gary299/High School DxD BorN episode 4 review/@comment-26209278-20150425213806/@comment-26209278-20150425223726

When i say filler, i meant the not important stuff, like some of the build up, not the RG itself :P

And that's what i was saying in an earlier comment: the RG is needed as it's the part of the basis of the Diodora betrayal, the reason they called off the youth games, and more or less the reason for the Sairaorg game...