Well, you can wait till the flashbacks is over and come back later. And seriously, for the speed the main ship goes, i don't think some flashbacks will matter. I rather watch flashback on something that already end than wait 80 chapters before they do something slighlty romantic. Seriously, we are at chapter 123 and we have so little progress. Being serious when i said that will probably never have a kiss before long if not never (and by long i mean not before 120 another chapter at this rate).