I was so ready to make a "Momo is gay for Kishi" comment for most of the chapter, but with that second to last page...I'm not saying it's impossible, but that makes the dynamic at least a little more complicated.
Also, with the first page I was like, "Wait, did Hime and Kishi have past lives in a cowboy universe too? Were they lovers in universes representing every genre and only got genderswapped in this one for some reason?" And no, clearly, but it's a fun idea to say the least.