D.D.D. is the guild with the princess and the old man that looks like a king isn't it? Vol 4 is where they become important and it looks like a large scale battle to me.
Soujiro... >_> currently dating 4 of them. I don't know but if Naotsugu see him again he might hit him
they didn't meet for 2 years to begin with. Or is Soujirou chick magnet since the tea party days.