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.
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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.
I think it's hard to have serious buildup on anything over 7 minutes of runtime.
Kaoru's coworker is getting divorced because her husband is cheating on her. Luckily, Hajime would never cheat... unless you count 2D girls, in which case he's cheating constantly.
This leads to a flashback of a love triangle back when they first met.