I didn't noticed at first, but chibiyuuto posted it with the same conclusion you got. Eerie! Yeah, you keep wondering if the landlady is actually Chitose or not (not the second or third time they pull her as a crossover o_o). Like I said to him, I'd hope Icchan was a bit more gentle than with poor Ogata ("Kimihiro-kun, your cake wasn't so good, here's an octopus for your pants XD")

Now the question would be, is HOLiCworld the same world as Chobits/Angelic Layer/Kobato? I hope not! Maybe they're alternative characters, Tsubasa style.

Or we're giving it a lot of thought and the house just looks the same...