First off, Circle and Square have (to my knowledge) made their first cameo appearances in another comic! Y2cl comic has a dedication featuring many webcomic characters, and you can see it right here!
So happy belated Valentine's day. I didn't do my valentines comic on Friday, so now it's after the fact. But there is more Heart/Diamond action to come! However, it's also President's day in the U.S.A. (I said that because it rhymes)! Sadly, no political cartoon for president's day this time, but I think Pentagon is due for an appearance in the nearish future ;)
In the meantime, you can also read the Valentine's comics of last year
when Heart was first introduced!