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.
I think it's hard to have serious buildup on anything over 7 minutes of runtime.
Kaoru is starting to get a little nervous. They keep letting her off work early because she's pregnant. What if... they don't need her anymore? Luckily, Hajime knows just what to say.
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Hajime has his own concerns. Is he really doing this right? Maybe he needs to try harder.