Yeah yeah, there's an underscore in @guest_'s name, I know; but Yugioh usually doesn't use those. And now that they've returned, I look forward to seeing what textual murals they shall craft.
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The card art used is Ceasefire — https://yugipedia.com/wiki/Ceasefire —. (I don't know how many fires @guest_'s comments have stopped, but the depiction of writing seemed appropriate.) The guys in the art don't actually have separate cards. And Spell Chronicle — https://yugipedia.com/wiki/Spell_Chronicle — is also a real card. I think its symbolism is rather obvious.

Definitely Valentine's goals.

Sometimes, it's all you need.

But this issue weighs heavily on their mind.

To some people, the shredded couch is worth it.

I bet they're putty in each other's hands.

I don't know about wholesome, but loudly proclaiming one's displeasure does seem to be in right now.

@captainjackharknes's name is based on Captain Jack Harkness, a character from Doctor Who, and his own series called Torchwood. I'll keep it short and say he's essentially an action guy who fights aliens (when he's not trying to bang them). So a spy type with fancy gear felt like a suitable representation.
Thus, the card art used is from SPYRAL GEAR - Fully Armed — https://yugipedia.com/wiki/SPYRAL_GEAR_-_Fully_Armed —. And the monster featured in the art is SPYRAL Super Agent — https://yugipedia.com/wiki/SPYRAL_Super_Agent —.
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And of course, there's also the Harkness Test on what you should consider before, um, engaging an alien: https://knowyourmeme.com/memes/harkness-test
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(I wonder if he can still also be summoned by mentioning Froppy.)

It's more fun when Terry shows up by himself. Of course, I get the feeling that that may not be the goal here.

Words to live by.

Next level kinky stuff.

Oh boy. How many "critical thinkers" do you think are gonna show up on this post alone. And how long are their "completely objective and well-reasearched discutions" gonna stretch this time.

A good choice, though so many hearts will undoubtedly be broken.