Yeah, that's standard 4koma fare as reminders to the (adult male) target audience that they can still think of the girls as their waifus. If you have seen or read Hidamari Sketch, remember Sae and her imaginary boyfriends? Others might disagree with me but I kind of think of it as a necessary evil, it's irritating but easy to wave off. There's no het romance here, I can say this much.
Yeah, I've read Hidamari Sketch. That was annoying, yeah, but at least I could ship her with Hiro. They were pretty much married.
I hate it when they try to ruin ships by bringing in talk about boys. It's like they're saying "look! They're not really lesbians!"
But I appreciate the subtext.