One of the other couples gets a flashback episode of how they got together.
--
Hajime goes to comiket. Kaoru reconnects with her girlfriends.
Does absence make the heart grow fonder? It looks like yes.
I think it's hard to have serious buildup on anything over 7 minutes of runtime.
A flashback shows us Hajime and Youta in their youth. Life is hard for femboys, but at least his older brother sticks up for him.
--
They visit Hajime's parents over the holiday. His father is shocked to discover that he actually got married and it wasn't a prank.