irrelevant
drive this ship through the crowd

I'm definitely missing the joke.

thescarredman said:

I'm definitely missing the joke.

Dark-haired girl really wants to see the red-head service the guy with a sexy maid cosplay, even if said guy is the red-head's brother. Implications of incest have no bearing on dark-haired girl's fetish for sexy maid service.

It feels like there might be a joke I'm missing here.

I think the title is just a combination of 胸板, referring to the thick chest (mostly male, well-trained), and 板チョコ, meaning a chocolate bar.