For the record, two months ago KKHTA's creator suddenly appeared, dropping 3 trailers on youtube as sentaku28.
Between "I want to know what is in Yukari-chan's heart" and a snippet of a love song, there's an oddly romantic air, despite the whole decapitation and body-stealing thing. Or perhaps that, too, is yuri.
Regardless, at least Zunusama seems to have noticed that air too. For a crack ship, they make an oddly fitting couple, and a cute one too. Here's to hoping KoiYuka catches on~