Ah yes, Sweet Tsundere Vanilla goodness!
So they both act like they don't really want this relationship or are just doing it for the time being before they each find 'someone else' or something like that. Really though, right when the perfect partner is right next to you the entire time.
But hey, at least they finally managed to confess to each other by the end. Certainly took awhile, and if only they'd been honest with each other the relationship would have advanced a lot sooner but...Well, if the result is some sweet Vanilla loving, I'm perfectly happy.