It's a BL manga where the seme is a kitsune and the uke is I think a sacrificial bride/meal? The seme talks about killing him eventually so the two made a deal: the uke gets to do whatever he wants in the last week of his life (I think this is also the time where the two started acting like newlyweds?) and after that week the seme will kill/eat him. The last time I read this there was a panel I distinctively remember where the seme feels reallyyy conflicted about killing him and stuff
I'm sensing that she's a fujoshi in disguise