Great character development
It's really something I'll re-read !!
In the beggining I though it would be just an light and funny plot, even a little smut. But after the first chapter I saw that the main there was family. I really love it when the story shows about how the familly is important, and how the wish to never be a burden or to not ruin their relationship as a family can make one suffer upon it.
It also have a good drama development, and the story goes on a medium rithm, neither slow nor fast, developing each couple with a lot of care about how to evolve their feelings.
Bokura No Negai