Poor Mana they are more indecisive than she thought. It's time for third wheel Mana to take the wheel and just crash them together until they go to bed so she can hear the stories later on
I mean, it has literally been 687 chapters. One would think they got together by now. Sure, each chapter might only be a single page, but still, that is literally 687 chapters! Most mangas don't even get that many!