Ayakashi no Oyome-san ni wa Narimasen! Hirotta Neko ga (Jishou) Dai Youkai Deshita 

Synopsis

“I’ve decided for you to be my bride!” I left the company I worked for to finally open a restaurant in the countryside. But even though I tried my best, things didn’t go so well. Until one night, a cat that I saved while I was out for a walk suddenly turned into a handsome man?! What’s more — he proposed to me? But he’s a cat?!?! This new, heart racing lifestyle begins!(Source: Comic Polaris, translated)